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Astronomy Cast

  1. Ep. 501: Water Worlds Revisited2018/10/08
    We're not learning that the vast majority of potentially habitable worlds out there are actually icy moons like Europa and Enceladus. Good news, there are hundreds, if not thousands of times more of them than worlds like Earth. Bad news, they're locked in ice. What have we learned about water worlds and their potential for habitability?
  2. Ep. 500: Live Celebration!2018/09/17
    Welcome to episode 500 of Astronomy Cast. To celebrate this momentous occasion, we’re going to look back 500 years into the past to see what we learned about the Universe. And then we’re going to look 500 years into the future.
  3. Ep. 499: What is the proposed Hubble-Lemaitre Law?2018/09/10
    We started out Astronomy Cast with the controversal decision to de-planet Pluto. And here we are, more than a decade later, at the brink of recording our 500th episode when another big decision is coming down from the IAU: whose name goes on the concept that our Universe is expanding: Hubble or Lemaître? It's a big deal and Pamela knows all about it.
  4. Astronomy Cast: On Hiatus until September 20182018/07/01
    Astronomy Cast will be on hiatus for July and August. Don't worry, we'll be back in September, and will be gearing up for our 500th episode!
  5. Ep. 498: Dwarf Galaxy Update2018/07/01
    The Milky Way has gobbled up dozens of dwarf galaxies and added them to its structure. Today we're going to look at the ongoing hunt for the wreckage of past mergers. And what we've discovered about dwarf galaxies in general.
  6. Ep. 497: Update on Globular Clusters2018/06/25
    Is it globular clusters or is it globeular clusters? It doesn't matter, they're awesome and we're here to update you on them.
  7. Ep. 496: Update on Stellar Populations I, II, and III2018/06/18
    Another update show, this time on the various generations of stars, let's get into it.
  8. Ep. 495: Update on Asteroids and Prospects of Asteroid Mining2018/06/11
    Our knowledge of space is starting to match up with our ability to get out there an explore it. There are several companies working on missions and techniques to harvest minerals from asteroids. What other resources are out there that we can use?
  9. Ep. 494: Icy Moons Update 20182018/06/04
    Thanks to Cassini and other spacecraft, we've learned a tremendous amount about the icy worlds in the Solar System, from Jupiter's Europa to Saturn's Enceladus, to Pluto's Charon. Geysers, food for bacteria, potential oceans under the ice and more. What new things have we learned about these places?
  10. Ep. 493: Mars Update 20182018/05/28
    If there's one place we've learned more about in the last 10 years, it's Mars. Thanks to all those rovers, orbiters, landers which are flying overhead, crawling around the surface, and digging into the rich Martian regolith. What have we learned about Elon Musk's future home?
  11. Ep. 492: Comets, Asteroids and KBO's2018/05/21
    Another topic with plenty of updates. Since we started Astronomy Cast we’ve visited many smaller objects in the Solar System up close, from Ceres and Vesta to Pluto, not to mention a comet. What have we learned?
  12. Ep 491: Exoplanet Update 20182018/05/14
    Finally, a big update. Have there been news in the realm of exoplanets? More news that we can possibly cover. But we’ll try our best.
  13. Ep 490: What's New with Supernovae2018/05/07
    Time for another update, this time we're going to look at what's new with supernovae. And once again, we've got good news, lots of new stuff to report.
  14. Ep 489: Black Hole Update2018/04/30
    Another update episode, this time we look at what’s new and changed in the research of black holes. And it’s here that we find a lot of substantial new discoveries in the field, so much has been discovered since we first covered black holes a decade ago.
  15. Ep 488: Dark Energy: 2018 Edition2018/04/23
    The updates continue. Last week we talked about dark matter, and this week we continue with its partner dark energy. Of course, they’re not really partners, unless you consider mysteriousness to be an attribute. Dark energy, that force that’s accelerating the expansion of the Universe. What have we learned?
  16. Ep 487: Dark Matter: 2018 Edition2018/04/13
    Last week, we gave you an update in particle physics. This week it’s time to see what’s new in the world of dark matter. Spoiler alert, we still have no idea what it is, but maybe a few more ideas for what it isn’t.
  17. Ep 486: Particle Physics Update2018/04/06
    It’s time for a news update. This time from the field of particle physics. It turns out there have been all kinds of new and interesting particles discovered by the Large Hadron Collider and others. Let’s get an update from Pamela.
  18. Ep 485: Docking, Refueling, and Transferring2018/03/30
    It’s one thing to get to space. But once you’ve made it there, what do you want to do? You’ll probably want to dock with another space ship, deliver cargo, refuel. Today we’ll talk about how all that happens.
  19. Ep 484: Transfer Orbits and Gravitational Assists2018/03/23
    If you want to get around in the Solar System, you’ll want to take advantage of natural gravitational speed boosts and transfer orbits. Whether you’re heading to the outer Solar System or you want to visit the Sun itself, the planets themselves can help you in your journey.
  20. Ep 483: Stopping in Space2018/03/16
    It’s one thing to get from Earth to space, but sometimes you want to do the opposite. You want to get into orbit or touch down gently on the surface of a planet and explore it. How do spacecraft stop? And what does that even mean when everything is orbiting?
  21. Ep 482: Alternative Ways to Space2018/03/09
    Getting to space is all about rockets, but people are trying to figure out other methods that could carry payloads to orbit and beyond. Railguns, airplanes, tethers and more. Today we’ll talk about alternative methods of spaceflight.
  22. Ep 481: Rockets pt. 3 - Going Faster, Higher, Farther after Fairing Separation2018/03/02
    We’ve seen rockets blast off from here on Earth. But that’s only half the story. Rockets have additional stages to push them into trajectories, like transfer orbits and various orbital manouvers. Let’s talk about what happens after the rocket is long gone, beyond our sight.
  23. Ep 480: Rockets pt. 2- Multi-stage Boosters2018/02/23
    The vast majority of rockets are multi-staged affairs. Why is this? What makes this kind of rocket so successful? Today we look at the ins and outs of multi-stage rockets.
  24. Ep. 479: Rockets pt. 1- What Does "Single Stage To Orbit" Really Mean?2018/02/16
    To celebrate the launch of the Falcon Heavy, we figured it was time for an all new series, this time on the rockets that carry us to space. Today we're going to talk about why single stage to orbit rockets are so difficult to carry out.
  25. Ep. 478: Apollo 8 with Paul Hildebrandt2018/02/09
    On Christmas Day, 1968 Frank Borman, James Lovell and William Anders became the first human being to see the far side of the Moon. Their mission, of course, was Apollo 8, the first time human beings had ever left Earth orbit and seen the far side of the Moon. Today we talk all about Apollo 8, with special guest Paul Hildebrandt, director of a new documentary about the mission.
  26. Ep. 477: State of Exploration: Once and Future Moon2018/02/02
    It's been decades since humans set foot on the Moon. Well, it's time to go back, in theory. Of course, we've heard this all before. What are the plans afoot to send humans back to the Moon this time. What hardware will we use, and what other strategies are in the works to make this happen?
  27. Ep. 476: The Overview Effect2018/01/26
    After they’ve been to space, many astronauts report that seeing the world from above has given them a totally new perspective on humanity and the state of our planet. It’s called the Overview Effect. Today we’ll talk about this, and what this perspective can teach us all.
  28. Updated audio - Ep. 475: Fast Radio Bursts2018/01/19
    You know what's fun? Mysteries. Here's one: fast radio bursts. Astronomers have been detecting mysterious one-time signals from across the sky. What's causing them? Nobody knows for sure, but the search is on to get to the bottom of them.
  29. Ep. 475: Fast Radio Bursts2018/01/19
    You know what's fun? Mysteries. Here's one: fast radio bursts. Astronomers have been detecting mysterious one-time signals from across the sky. What's causing them? Nobody knows for sure, but the search is on to get to the bottom of them.
  30. Ep. 474: Predictions for 20182018/01/12
    Phew, 2018, time to press the reset button and enjoy a whole new year of space exploration and space science. What’s coming up this year? What should we expect to launch, and what will we see in the sky?
  31. Ep. 473: Remembering the Best Space Science of 20172018/01/05
    2017 was a crazy year for, well, you know. But, it was a great year for space science, a kilonova, extrasolar planets, reusable rockets and more. Let’s look back at the year that was and remember our favorite space science.
  32. Ep. 472: Best Modern Sci Fi for the Science Lover - Part 4: Bioscience2017/12/29
    What happens when the future meets biology? Bioscience science fiction, of course. And that's our focus today as we continue our journey though science-based science fiction.
  33. Ep. 471: Best Modern Sci Fi for the Science Lover - Part 3: Human Computer Relations2017/12/22
    It's time to talk computers, and how we're going to be dealing with them in the future. In our next segment on modern sci-fi, we talk about the future of the human-computer interface.
  34. Ep. 470: Best Modern Sci Fi for the Science Lover - Part 2: 3D Printing2017/12/15
    Our journey through interesting science fiction, this time we talk about speculative fiction dealing with materials science, nanotechnology and 3D printing. It’s a staple in Star Trek, but what other stories deal with it?
  35. Ep. 469: Best Modern Sci Fi for the Science Lover - Part 1 Space Exploration2017/12/08
    We’ve always been fans of science fiction, but we really like our science. Today we’ll talk about some books we’ve been reading recently that do a good job of dealing with the science in science fiction.
  36. Ep. 468: Simulations for Science and Fun2017/12/01
    Astronomers depend on simulations to study the Universe. From relatively straightforward orbital simulations to vast simulations that try to recreate the large scale structure of the Universe from the Big Bang. Today we're going to talk about some of those simulations, as well as tools you can use simulate the Universe.
  37. Ep. 467: Resonance2017/11/19
    Many of the moons and planets across the Universe are in resonance with each other and their star. What causes this resonance, and how can it help us understand the history of planetary formation and migration?
  38. Ep. 466: Origins of Zero (0)2017/11/17
    We depend on zero for our math to work right, but this number was actually invented in fairly recent times. Why do we need zero? Was it inevitable?
  39. Ep. 465: Exploiting Interfering Light2017/11/10
    Electromagnetic radiation, also known as “light” is pretty handy for astronomers. They can use it to directly and indirectly observe stars, nebula, planets and more. But as you probably know, light can act like a wave, creating interference patterns to teach us even more about the Universe.
  40. Ep. 464: Why the Hype over an Exorock?2017/11/06
    Astronomers this week announced that they had discovered an asteroid or comet on a trajectory that brought it from outside the Solar System? Is this the first case of an object from deep space? And what can we learn from this discovery?
  41. Ep. 463: Pareidolia and the Moon2017/10/30
    The man in the moon, the pyramids on Mars. Every cloud, ever. Humans have a tendency to pattern match when they're looking around the Universe - it's called pareidolia. What causes this behaviour, and how can we use this to debunk some hilarious conspiracy theories?
  42. Ep. 462: Modeling the Weather2017/10/23
    Have you noticed that weather forecasting has gotten much better in the last few years? Thanks to weather satellites, weather stations, and better forecasting techniques. How do scientists predict the weather with any kind of accuracy days or even weeks in the future.
  43. Ep. 461: Measuring the Weather with Satellites2017/10/16
    What’s the weather doing? Is it going to rain today? How much? What about temperatures? We depend on modern weather forecasting, thanks, in part to the vast network of weather satellites. What instruments do they have, what orbits do they use.
  44. Ep. 460: Earth from Afar: Remote Sensing2017/10/09
    The space age has given us the ability to look at every corner of the globe in every wavelength. It’s revolutionized our ability to predict the weather, keep track of environmental damage, and watch the world change. Today we look at what missions and technologies give us the ability to watch our world from afar.
  45. Ep. 459: Arecibo Observatory2017/10/02
    And now Cassini’s gone. Smashed up in the atmosphere of Saturn. But planetary scientists are going to be picking through all those pictures and data for decades. Let’s look back at some of the science gathered up by Cassini so far, and we can still learn from this epic journey.
  46. Ep. 458: The Science of Cassini2017/09/25
    And now Cassini’s gone. Smashed up in the atmosphere of Saturn. But planetary scientists are going to be picking through all those pictures and data for decades. Let’s look back at some of the science gathered up by Cassini so far, and we can still learn from this epic journey.
  47. Ep. 457: Why Did Cassini Have To Die? In Memoriam2017/09/18
    It's time to say goodbye to an old friend, NASA's Cassini spacecraft, which has been orbiting within the Saturnian system since 2004. But why does a seemingly healthy spacecraft and mission need to come to an end? Today we look back at the mission, some of the amazing discoveries, and why its finale was necessary.
  48. Ep. 456: Pluto Revisited2017/09/11
    This week, we return to our starting point, where Astronomy Cast began: Pluto. 11 years on, we have a whole new appreciate for the dwarf planet Pluto. We’ve visited it, probed it and taken pictures. It’s time for an update.
  49. Ep. 455: Your Practical Guide to Colonizing the Milky Way!2017/08/28
    This episode was recorded live in St. Louis, MO at the Astronomy Cast Solar Eclipse Escape 2017. Listen as we discuss how humans might be able to colonize the Milky Way!
  50. Astronomy Cast Extra: Solar Eclipse 1012017/08/21
    This episode was recorded live in St. Louis, MO at the Astronomy Cast Solar Eclipse Escape 2017. We're going to give you a set of last minute tips and info to prepare for the Great American Eclipse!
  51. Ep. 454: Things We're Looking Forward To2017/06/19
    As we wrap up season 10 of Astronomy Cast, we look forward to all the instruments, missions and science results on the distant horizon. Think astronomy is exciting already? Just you wait.
  52. Ep. 453: Favorite Things We've Done These 10 Years2017/06/11
    10 years of Astronomy Cast... wow. It's been a long, fun journey. What are some of our favorite episodes and adventures over the decade we've been doing this show.
  53. Ep. 452: Summer Observing Challenges2017/06/05
    Summer is almost here, and for the northern hemisphere, that means warm nights for observing. But what to observe? We're here with a list of events and targets for you to enjoy over the summer. Get your calendars handy, and start organizing some events with your friends, and then get out there!
  54. Ep. 451: When Can I Buy My Ticket To Space?2017/05/29
    Like most of us, you probably want to know what it would be like to travel to space. Maybe not to live, but just to visit. You want to be a space tourist. Good news, there are a bunch of companies working hard to give you the opportunity to fly to space. How long until you can buy a ticket?
  55. Ep. 450: Inflatable Habitats2017/05/21
    In order to live in space, we'll need to live in a habitat that simulates the temperature, pressure and atmosphere of Earth. And one of the most interesting ideas for how to do this will be with inflatable habitats. In fact, there are a few habitats in the works right now, including one attached to the International Space Station.
  56. Ep. 449: Robots in Space!2017/05/08
    When you think of a robot, you’re probably imagining some kind of human-shaped machine. And until now, the robotic spacecraft we’ve sent out into space to help us explore the Solar System look nothing like that. But that vision of robots is coming back, thanks to a few new robots in development by NASA and other groups.
  57. Ep. 448: Prepping for the Eclipse2017/05/01
    On Monday, August 21, 2017, there’s going to be a total eclipse of the Sun, visible to path that goes right through the middle of the United States. You should be making plans to see this, and we’re here to help you know where to go and what to do.
  58. Ep. 447: Animals in Space Pt. 3: Dogs, Monkeys and More2017/04/24
    For the final episode in our 3-part episode about animals in space, we look at the largest animals to go to orbit. And I’ll just warn you now, this is going to be a really sad episode.
  59. Ep. 446: Animals in Space Pt. 2: Mice and Other Small Animals2017/04/17
    Last week we talked about how the smallest creatures behave in space, but now we move up in size a little to small animals, like mice. What missions have they flown on, and how does microgravity affect their biology?
  60. Ep. 445: Animals in Space Pt. 1: Insects and Arachnids2017/04/10
    We've talked about animals traveling to space in the past, but it's time to take another look, with many other creatures making the trip to the void. Today we're going to talk about the spineless insects and arthropods, and those tough as nails waterbears – tardigrades.
  61. Ep. 444: Fractals2017/04/03
    For this historic 444th episode of Astronomy Cast, we talk about fractals. Those amazing mathematical visualizations of recursive algorithms. What are they, how do you get them? Why are they important?
  62. Ep. 443: Destroy and Rebuild Pt. 7: Tsunamis2017/03/13
    Surf’s up! Today we’re going to be talking about one of the most devastating natural disasters out there: tsunamis. We’re talking huge waves that wreck the seashore. But it turns out, there many ways you can get a tsunami, and one of those has to do with space.
  63. Ep. 442: Destroy and Rebuild Pt. 6: Magnetic Pole Reversal2017/03/06
    If we look back into the geologic record of the Earth, it appears that our planet’s magnetic field flips polarity every few hundred thousand years or so. Why does this happen? When’s it supposed to happen next? Is it dangerous?
  64. Ep. 441: Destroy and Rebuild, Pt. 5: Continental Drift2017/02/27
    Want to travel the world but you don’t have a lot of money? No problem, your continent is drifting across the surface of the Earth right now. In a few million years, you’ll reach your destination.
  65. Ep. 440: Destroy and Rebuild, Pt. 4: Supervolcanoes!2017/02/20
    There are regular volcanoes, and then there are the supervolcanoes. Massive calderas of hot magma of incomprehensible size. Bad news, these things explode randomly and catastrophically. Worse news, there are a bunch around the Earth.
  66. Ep. 439: Destroy and Rebuild, Pt. 3: How Do We Terraform Earth?2017/02/14
    We always want to talk about how we can make Mars more Earth like, but the reality is that we’re making Earth more Venus-Like. We’re Venusforming Earth. What are the various factors we’re impacting on a global scale, and how can we fix them?
  67. Ep. 438: Destroy and Rebuild, Pt. 2: Geoengineering2017/02/06
    We know humans are having an impact on planet Earth, but what if we really put our backs into it, and intentionally tried to change the entire planet? Either to make it better, or to fix some terrible mistake we've made. The technique is called geoengineering. Could it work?
  68. Ep. 437: Destroy and Rebuild, Pt. 1: The Torino Scale2017/01/30
    We love to destroy the universe, and also rebuild it. Today we begin a new series where we destroy and rebuild. Let's talk about some existential threats we face, and ways we could recover, starting with the sword of Damocles hanging over our head: killer asteroids!
  69. Ep. 436: Common Misconceptions in Probability2017/01/23
    Human beings are bad at many things, but we're particularly terrible at understanding probability in a rational way. We underestimate, overestimate and generally mess up probability. We'll try to fix it here, but we'll surely fail.
  70. Ep. 435: The Butterfly Effect2017/01/16
    Small changes can have a big impact. But can a butterfly’s wingbeat in the Amazon really impact the weather halfway across the world? And where do small changes have no impact?
  71. Ep. 434: Am I On An Alien World?2017/01/09
    Once again, science fiction television and movies has let you down. They try to recreate what it might be like on an alien world, but surprise surprise, they mostly get it wrong. That’s because a truly alien world would be different in so many ways, it would blow your mind. Today we’ll help you figure out if you’re on a movie set, or you’ve actually crashlanded on an alien planet.
  72. Ep. 433: Volcanoes on Mars2017/01/03
    Mars is a world of extremes. This unassuming red world is home to the largest and tallest volcanoes in the entire Solar System. In fact, it’s not even a close contest, with Olympus Mons rising 22 km above the surrounding plains, more than twice as tall as Mount Everest. How did Mars get such big volcanoes, and how active is the planet today?
  73. Ep. 432: Geoglogic Ages of Mars - From Wet and Wild to Desolate Desert2016/12/26
    Today, Mars is a desolate wasteland, with dusty red rocks and sand stretching out to the horizon. But billions of years ago, it was a vastly different world. It was blue, with oceans, rivers, lakes, and maybe life? Let’s tell the story of geology on Mars, and we got from that world to the one we see today.
  74. Ep. 431: The Search for Life on Mars2016/12/12
    Enceladus and Europa are all the rage these days, but classic Mars is still a great place to search for life. In fact, ESA’s ExoMars is scanning the planet’s atmosphere for methane, evidence that there might be life there right now. Let’s talk about the search for life on the Red Planet.
  75. Ep. 430: Coming Home from Mars2016/12/08
    Landing on the surface of Mars is very difficult. In fact, it’s probably the toughest planet to land on in the whole Solar System. Today we’ll talk about what it’s going to take to get to and return from Mars!
  76. Ep. 429: Living on Mars2016/11/28
    When Elon Musk announced plans to send humans to Mars, he conveniently left out one important aspect. How are we supposed to survive on a place this hostile to life? Seriously, Mars sucks, and it's going to take some impressive techniques and technologies to make it on the Red Planet.
  77. Ep. 428: The Moons of Mars2016/11/25
    We begin a miniseries on Mars. How many episodes will we do? Who knows? But we start today with a discussion of the two Mars moons, Phobos and Deimos.
  78. Ep. 427: Click Bait vs Clear Science2016/11/07
    Did you hear that Dark Energy doesn't exist any more? Neither does Dark Matter? It turns out that NASA recalculated the Zodiac and now you're an Ophiuchan! Science is hard enough, but communicating that science out to the public when there are publications hungry for traffic is even harder! Here's how to parse the click-bait science titles.
  79. Ep. 426: Confirmation Bias2016/10/29
    I hate to tell you this, but that meat computer in your skull is constantly betraying you. Don’t worry, we’ve all got the same, but fortunately, scientists have learned how this happens, and can help us make sure our science, and lives don’t suffer because of it.
  80. Ep. 425: Naming Spacecraft2016/10/21
    Have you ever noticed spacecraft missions have some pretty cool names? How does anyone decide what to call these things?
  81. Ep. 424: Lightning2016/10/17
    It turns out that nature figured out how to use electricity long before humans did. Lightning storms are common across the Earth, and even the Solar System. What causes this electricity in the sky, and how can science use it?
  82. Ep. 423: Cyclones2016/10/11
    As Hurricane Matthew reminded us, cyclonic storms are a force to be reckoned with. What causes these storms, and how can they form across the Solar System.
  83. Ep. 422: Geysers2016/10/03
    So if you’ve been to Yellowstone National Park, you’ve seen one of the most amazing features of the natural world – geysers. In today’s episode, we’re going to talk about geysers on Earth, and where they might be in the solar system.
  84. Ep. 421: Space Games!2016/09/26
    As you probably know, Fraser is an avid video gamer, especially if it has anything to do with space. Today we turn things around, as Fraser talks about the games he plays, and what he thinks you should be playing too.
  85. Ep. 420: FIRE!2016/09/19
    One of the most dangerous things that can happen inside a spacecraft is fire. Seriously, it’s NASA’s worst nightmare, and for good reason. Fire acts differently in space, and astronauts are always on alert. Here’s why.
  86. Ep. 419: DragonCon 2016 Live - Rocket Girls2016/09/15
    This episode is a special live show that took place at DragonCon 2016 in Atlanta, GA. Pamela hosted a panel of amazing scientists and engineers who all happen to be women, and they discussed the unsung women of NASA and the early Space Age and their roles as “human computers”, and the current climate at JPL for women scientists and engineers.
  87. Ep. 418: Error 418 – I’m a Teapot!2016/06/27
    One of the most familiar asterisms in the night sky is the Teapot, in Sagittarius. Today we’re going to talk about that and have a bonus conversation about Bertrand Russell’s Teapot Argument.
  88. Ep. 417: Error 417: Expectation Failed2016/06/20
    In all fields of science, sometimes more is learned when you fail at what you’re trying to do than when you succeed. So what new science discoveries have failed expectations given us in astronomy?
  89. Ep. 416: Fireballs from the Sky!2016/06/13
    Every now and then we look up and see bright fiery balls falling from the sky. Don’t panic, these are just bolides. Sometimes they leave trails, sometimes they explode, and sometimes they survive all the way to the ground.
  90. Ep. 415: Temperature of the Universe2016/05/30
    The temperature of the Universe can vary a dramatic amount from the hot cores of stars to the vast cold emptiness of deep space. What’s the temperature of the Universe now, and what will it be in the future?
  91. Ep. 414: Navigating Far2016/05/16
    In our last episode, we talked about what it’ll take to navigate across the Solar System. In this episode we scale things up and speculate how future civilizations will navigate to other stars and even other galaxies.
  92. Ep. 413: Navigating Near2016/05/09
    It’s hard enough finding your way around planet Earth, but what do you do when you’re trying to find your way around the Solar System? Today we’ll talk about how spacecraft navigate from world to world.
  93. Ep. 412: The Color of the Universe2016/04/25
    What color is the Universe? Turns out this isn’t a simple question, and one that scientists have really been unable to answer, until now!
  94. Ep. 411: Science of Sunset Colors2016/04/18
    We all enjoy beautiful, multicolored sunsets. But what causes the brilliant oranges, pinks and purples that we see, and why does it change from day to day and season to season?
  95. Ep. 410: Planet 9 Facts and Fiction2016/04/11
    The discovery of Planet 9 has caused a wonderful, confusing uproar and a flood of misinformation in the news and social media. We’ll sort out what we actually know, what things just aren’t true, and what things might be possible!
  96. Ep. 409: Spin in the Universe2016/04/04
    The Solar System is a spinny place. Everything’s turning turning. But if you look closely, there are some pretty strange spins going on. Today we talk about how everything started turning, and the factors that still “impact” them today.
  97. Ep. 408: Universe Cannibalism2016/03/28
    We’ve talked about stellar cannibalism and galactic cannibalism, but now it’s time to take this concept to its logical extreme – universe cannibalism. In the multiverse theory of physics we live in just one of a vast range of universes which might interact with each other. Let’s look for the evidence.
  98. Ep. 407: Galactic Cannibalism2016/03/14
    Remember when we told you that the Universe is a big place, and anything that can go wrong, inevitably does? Today we talk about what happens when galaxies come together. This is particularly pertinent because our Milky Way will collide with Andromeda in the future!
  99. Ep. 406: Stellar Cannibalism2016/03/07
    Most of the time stars hang around for billions of years. But the Universe is a big place, and anything that can go wrong, inevitably does. Today we talk about what happens when these stars come together. The outcome is violent, and fortunately for you, also interesting.
  100. Ep. 405: Method Not Found2016/02/29
    Last week we talked about knowledge, what we do and don’t know. This week we talk about questions which are impossible to ask, where the answers don’t actually exist.
  101. Ep. 404: The Difference Between: Can’t Know, Don’t Know, and Just Awaiting Better Tech2016/02/22
    There the things we know, the things we don’t know, and the things we can’t know. How do we know which one is when when we’re deciding to fund research and direct our scientific inquiry.
  102. Ep. 403: Funding Big Science: from Alma to LIGO to TMT2016/02/15
    How much of a challenge is it to get funding for large projects like LIGO? Fraser and Pamela discuss the difficult issues finding “Big Money.”
  103. Ep. 402: Gravity Eyes: See The Invisible With The Force2016/02/08
    What kinds of things can we see using gravity, that we may not otherwise be able to see? Pamela will fill us in on the Great Attractor, etc!
  104. Ep. 401: Future Predictions2016/02/01
    What do Pamela and Fraser think will happen or be discovered in 2016? What would they like to see in the near future?
  105. Ep. 400: The State of the Universe2016/01/25
    It’s time for us to go back and catch up with all of the projects, news stories, weird star systems, and other topics that need updating!
  106. Ep. 399: Women in Science2016/01/11
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  107. Ep. 398: Seeing Things: Emitting, Reflecting, Ionizing Light2016/01/04
    Astronomers gather electromagnetic radiation with the telescopes: mostly visible light. But sometimes they've got to be clever about where they look for these elusive photons. Light can get emitted, absorbed, reflected, and each method tells astronomers a little more about what they're looking at.
  108. Ep. 397: A Universe From Nothing2015/12/21
    One of the biggest, most basic questions you can ask is: “why is there something and not nothing?” The reality is that we don’t know the answer, we might never know the answer. Today we’ll investigate this mystery, recently covered by the physicist Lawrence Krauss in his book of the same name.
  109. Ep. 396: Family Astronomy for the Holidays2015/12/14
    Every year, it’s the same dilemma: what gift should you get for the super space nerd in the family? And if someone has a budding interest in space and astronomy, what can you do to feed their hunger for knowledge? Today we’ll talk telescopes, books and planispheres. Everything you need to avoid a holiday gift disaster.
  110. Ep. 395: Baryons and Beyond the Standard Model2015/12/07
    Info (Show/Hide)
  111. Ep. 394: The Standard Model - Bosons2015/12/05
  112. Ep. 393: The Standard Model, Leptons and Quarks2015/11/30
  113. Ep. 392: The Standard Model - Intro2015/11/23
  114. Ep. 391: Entrophy2015/11/16
  115. Ep. 390: Occam’s Razor and the Problem with Probabilities2015/11/09
  116. Ep. 389: Roundtable with Paul Sutter2015/10/31
  117. Ep. 388: Megastructures2015/10/26
  118. Ep. 387: Water on Mars… Again2015/10/19
  119. Ep. 386: Orbiting Observers2015/10/12
  120. Ep. 385: Rovers on the Run2015/10/05
  121. Ep. 384: Escaping Probes2015/09/29
  122. Ep. 383: Approaches to Absolute Zero2015/07/07
  123. Ep. 382: Degenerate Matter2015/06/30
  124. Ep. 381: Hollowing Asteroids in Science and Fiction2015/06/23
  125. Ep. 380: The Limits of Optics2015/06/15
  126. Ep. 379: Fermi's Atom Splitting2015/06/15
  127. Ep. 378: Rutherford and Atoms2015/06/08
  128. Ep. 377: Thomson finds Electron2015/06/01
  129. Ep. 376: The Miller-Urey Experiment2015/05/18
  130. Ep. 375: The Search For Life in the Solar System2015/05/04
  131. Ep. 374: Stern-Gerlach Experiment2015/04/27
  132. Ep. 373: Becquerel Experiment (Radiation)2015/04/13
  133. Ep. 372: The Millikan Oil Drop2015/04/06
  134. Ep. 371: Eddington Eclipse Experiment2015/03/30
  135. Ep. 370: The Kaufmann–Bucherer–Neumann Experiments2015/03/23
  136. Ep. 369: The Fizeau Experiment2015/03/16
  137. Ep. 368: Searching for the Aether Wind: the Michelson–Morley Experiment2015/02/23
  138. Ep. 367: Spitzer does Exoplanets2015/02/16
  139. Ep. 366: HARPS Spectrograph2015/02/09
  140. Ep. 365: Gaia2015/02/02
  141. Ep. 364: The COROT Mission2015/01/26
  142. Ep. 363: Where Did Earth's Water Come From?2015/01/19
  143. Ep. 362: Modern Women: Carolyn Porco2015/01/12
  144. Ep. 361: Modern Women: Maria Zuber2015/01/05
  145. Ep. 360: Modern Women: Jocelyn Bell Burnell2014/12/29
  146. Ep. 359: Modern Women: Margaret Geller2014/12/15
  147. Ep. 358: Modern Women: Sandra Faber2014/12/08
  148. Ep. 357: Modern Women: Vera Rubin2014/12/01
  149. Ep. 356: Rotational Inertia2014/11/24
  150. Ep. 355: Maker Space: 3D Printing Exploration2014/11/17
  151. Ep. 354: Comet Siding Spring vs. Mars2014/11/10
  152. Ep. 353: Seasons on Saturn2014/10/20
  153. Ep. 352: Water, Water Everywhere!2014/10/06
  154. Special Episode: Live from DragonCon 2014!2014/09/29
  155. Ep. 351: Asteroid Adventures2014/09/22
  156. Ep. 350: Space Ship One2014/07/07
  157. Ep. 349: Mercury 7 and How the US Picked the First Astronauts2014/06/30
  158. Ep. 348: Places with Numbers: 2 Independence Sq (NASA HQ)2014/06/23
  159. Ep. 347: Live from Balticon!2014/06/09
  160. Ep. 346: Numbered Places: Area 512014/05/26
  161. Ep. 345: Numbered Places: Launch Complex 392014/05/19
  162. Ep. 344: The Rings of Saturn2014/05/05
  163. Ep. 343: The Universe is Trying To Kill You2014/04/28
  164. Ep. 342: Sunsetting Spacecraft2014/04/15
  165. Ep. 341: 45th Lunar and Planetary Science Conference2014/04/11
  166. Ep. 340: Wernher von Braun2014/04/07
  167. Ep. 339: Space Conspiracy Theories2014/03/31
  168. Ep. 338: Copernicus2014/03/24
  169. Ep. 337: Photometry2014/03/17
  170. Ep. 336: Units of Measure2014/03/10
  171. Ep. 335:Photoelectric Effect2014/02/24
  172. Ep. 334: Chelyabinsk2014/02/17
  173. Ep. 333: When Worlds Collide2014/02/10
  174. Ep. 332: Stellar Collisions2014/02/03
  175. Ep. 331: Arthur C. Clarke’s Technologies2014/01/27
  176. Ep. 330: Arthur C. Clarke2014/01/20
  177. Ep. 329: Telescope Making, Part 3: Space Telescopes2014/01/13
  178. Ep. 328: Telescope Making, Part 2: Serious Gear2014/01/06
  179. Ep. 327: Telescope Making, Part 1: Toys and Kits2013/12/30
  180. Ep. 326: Atmospheric Dust2013/12/23
  181. Ep. 325: Cold Fusion2013/12/18
  182. Ep. 324: Sun Grazers2013/12/09
  183. Ep. 323: Isotopes2013/12/03
  184. Ep. 322: SOHO2013/11/25
  185. Ep. 321: Solar Flares2013/11/18
  186. Ep. 320: Layers of the Sun2013/11/11
  187. Ep. 319: The Zodiac2013/11/04
  188. Ep. 318: Escape Velocity2013/10/28
  189. Ep. 317: Observatories2013/10/23
  190. Ep. 316: Observational vs. Experimental Science2013/10/14
  191. Ep. 315: Particle Accelerators2013/10/07
  192. Ep. 314: Acceleration2013/07/08
  193. Ep. 313: Precession2013/07/01
  194. Ep. 312: Inverse-Square Law and Other Strangeness2013/06/24
  195. Ep. 311: Sound2013/06/17
  196. Ep. 309: Creating a Scienc-y Society2013/06/03
  197. Ep. 308: Climate Change2013/05/27
  198. Ep. 307: The Pacific Ring of Fire2013/05/20
  199. Ep. 306: Accretion Discs2013/05/13
  200. Ep. 305: The Spacecraft That Wouldn't Die2013/05/06
  201. Ep. 304: Death of a Spacecraft2013/04/29
  202. Ep. 303: Equilibrium2013/04/22
  203. Ep. 302: Planetary Motion in the Sky2013/04/15
  204. Ep. 301: Planetary Migration2013/04/08
  205. Ep. 300: What We've Learned in Almost 7 Years2013/04/01
  206. Ep. 299: Space Stations, Part 4 — Future Space Station2013/03/25
  207. Ep. 298: Space Stations, Part 3 — International Space Station2013/03/18
  208. Ep. 297: Space Stations, Part 2 — Mir 2013/03/11
  209. Ep. 296: Space Stations, Part 1 — Salyut and Skylab 2013/03/04
  210. Ep. 295: The Observable Universe2013/02/18
  211. Ep. 294: The Arecibo Observatory2013/02/11
  212. Ep. 293: Earthquakes2013/02/11
  213. Ep. 292: The Oort Cloud2013/02/04
  214. Ep. 291: Shockwaves2013/01/28
  215. Ep. 290: Failed Stars2013/01/21
  216. Ep. 289: Cherenkov Radiation2013/01/14
  217. Ep. 288: Phases of Matter2013/01/07
  218. Ep. 287: E=mc^22012/12/31
  219. Ep. 286: How to Debunk an End-of-the-World Myth2012/12/24
  220. Ep. 285: How the World Will Really End2012/12/17
  221. Ep. 284: Optics2012/12/10
  222. Ep. 283: Stellar Motion2012/12/03
  223. Ep. 282: Seasons2012/11/26
  224. Ep. 281: Explosions in Space2012/11/19
  225. Ep. 280: The Cosmological Constant2012/11/12
  226. Ep. 279: The Hubble Constant2012/11/05
  227. Ep. 278: Animals in Space2012/10/29
  228. Ep. 277: Orbit2012/10/22
  229. Ep. 276: XMM-Newton2012/10/15
  230. Ep. 275: Isaac Newton2012/10/08
  231. Ep. 274: Vesta2012/10/01
  232. Ep. 273: Solutions to the Fermi Paradox2012/09/24
  233. Ep. 272: Abiogenesis2012/09/17
  234. Ep. 271: Who Does What in Space and Astronomy2012/09/10
  235. Astronomy Cast at Dragon*Con 2012: Space Money2012/09/03
  236. Ep. 270: Inertia2012/06/18
  237. Ep. 269: Mass2012/06/11
  238. Ep. 268: Energy2012/06/04
  239. Ep. 267: Infinities2012/05/28
  240. Ep. 266: Archimedes2012/05/21
  241. Ep. 265: Arthur Eddington2012/05/14
  242. Ep. 264: Hazards of Spaceflight2012/05/07
  243. Ep. 263: Radioactive Decay2012/04/30
  244. Ep. 262: Solar Sails2012/04/23
  245. Ep. 261: Lasers and Masers in Astronomy2012/04/16
  246. Ep. 260: The Technology of Lasers and Masers2012/04/09
  247. Ep. 259: Exploration of Venus2012/04/02
  248. Ep. 258: Viking Landers2012/03/26
  249. Ep. 257: Viking Orbiters2012/03/19
  250. Ep. 256: Resolution2012/03/12
  251. Ep. 255: Observing Hydrogen2012/03/05
  252. Ep 254: Reflection and Refraction2012/02/27
  253. Ep. 253: Rayleigh Scattering2012/02/20
  254. Ep. 252: Heisenberg Uncertainty Principle2012/02/13
  255. Ep. 251: Messier Catalog2012/02/06
  256. Ep. 250: Precision2012/01/30
  257. Ep. 249: Schrödinger’s Cat2012/01/23
  258. Ep. 248: Carina Constellation2012/01/16
  259. Ep. 247: The Ages of Things2012/01/09
  260. Ep. 246: What If Something Was Different?2012/01/02
  261. Ep. 245: Calendars2011/12/26
  262. Ep. 244: Io2011/12/19
  263. Ep. 243: Tunguska Event2011/12/12
  264. Ep. 242: Torino Scale2011/12/05
  265. Ep. 241: Astrophotography, Part 3: Image Processing2011/11/28
  266. Ep. 240: Astrophotography, Part 2: Techniques2011/11/21
  267. Ep. 239: Astrophotography, Part 1: The Gear2011/11/14
  268. Ep. 238: Solar Activity2011/11/07
  269. Ep. 237: Spooky Space Sounds2011/10/31
  270. Ep. 236: Einstein Was Right2011/10/24
  271. Ep. 235: Einstein2011/10/17
  272. Astronomy Cast at Dragon*Con 2011: Strange Stuff in Space2011/10/15
  273. Ep. 234: Lunar Phases2011/10/10
  274. Ep. 233: Radar2011/10/03
  275. Ep. 232: Galileo Spacecraft2011/09/26
  276. Ep. 231: Galileo Galilei2011/05/02
  277. Ep. 230: Christiaan Huygens2011/04/25
  278. Ep. 229: Cassini Mission2011/04/18
  279. Ep. 228: Giovanni Cassini2011/04/11
  280. Ep. 227: The Big Dipper2011/04/04
  281. Ep. 226: Weather2011/03/28
  282. Ep. 225: Ice in Space2011/03/21
  283. Ep. 224: Orion2011/03/14
  284. Ep. 223: The Transit of Venus2011/03/07
  285. Ep. 222: The Decadal Survey2011/02/28
  286. Ep. 221: Geomorphology2011/02/21
  287. Ep. 220: Mass Extinction Events2011/02/14
  288. Ep. 219: Planck Mission2011/02/07
  289. Ep. 218: Max Planck2011/01/31
  290. Ep. 217: Stellar Classification2011/01/24
  291. Ep. 216: Archaeoastronomy2011/01/17
  292. Episode 215: Light Echoes2011/01/10
  293. Episode 214: Space Tourism2011/01/03
  294. Episode 213: Supermassive Black Holes2010/12/27
  295. Episode 212: GPS Navigation2010/12/20
  296. Episode 211: Celestial Navigation2010/12/13
  297. Episode 210: Mars Exploration Rovers2010/12/06
  298. Episode 209: Exotic Life2010/11/29
  299. Episode 208: Spitzer Space Telescope2010/11/22
  300. Episode 207: Lyman Spitzer2010/11/15
  301. Episode 206: Fission2010/11/08
  302. Episode 205: Fusion2010/11/01
  303. Episode 204: Temperature2010/10/25
  304. Episode 203: Europa2010/10/18
  305. Episode 202: The Planets at Gliese 5812010/10/11
  306. Episode 201: Titan2010/10/04
  307. Episode 200: The Mariner Program2010/09/27
  308. Episode 199: The Voyager Program2010/09/20
  309. Episode 198: How is a Space Mission Chosen?2010/09/13
  310. Ep. 197: Astronomy Cast Live from Dragon*Con 20102010/09/06
  311. Ep. 196: Luminosity and Magnitude2010/06/28
  312. Ep. 195: Planetary Rings2010/06/21
  313. Ep. 194: Dwarf Planets2010/06/14
  314. Ep. 193: Astronomy with the Unaided Eye2010/06/07
  315. Ep. 192: Chandra X-Ray Observatory2010/05/31
  316. Ep. 191: Chandrasekhar2010/05/24
  317. Ep. 190: Kepler Mission2010/05/17
  318. Ep. 189: Johannes Kepler and His Laws of Planetary Motion2010/05/10
  319. Ep. 188: The Future of Astronomy2010/05/03
  320. Ep. 187: History of Astronomy, Part 5: The 20th Century2010/04/26
  321. Ep. 186: History of Astronomy, Part 4: The Beginning of Modern Astronomy 2010/04/19
  322. Ep. 185: History of Astronomy, Part 3: The Renaissance2010/04/12
  323. Ep. 184: History of Astronomy, Part 2: The Greeks2010/04/05
  324. Ep. 183: History of Astronomy, Part 1: The Ancient Astronomers2010/03/29
  325. Ep. 182: Astrometry2010/03/22
  326. Ep. 181: Rotation2010/03/15
  327. Ep. 180: Albedo2010/03/08
  328. Ep. 179: Mysteries of the Universe, Part 22010/03/01
  329. Ep. 178: Mysteries of the Universe, Part 12010/02/22
  330. Ep. 177: Mysteries of the Milky Way, Part 22010/02/15
  331. Ep. 176: Mysteries of the Milky Way, Part 12010/02/08
  332. Ep. 175: Mysteries of the Solar System, Part 22010/02/01
  333. Ep. 174: Mysteries of the Solar System, Part 12010/01/25
  334. Ep. 173: Herschel Space Observatory2010/01/18
  335. Ep. 172: William Herschel2010/01/11
  336. Ep. 171: Solar System Movements and Positions2010/01/04
  337. Ep. 170: Coordinate Systems 2009/12/28
  338. Ep. 169: Fermi Mission2009/12/21
  339. Ep. 168: Enrico Fermi2009/12/14
  340. Ep. 167: Future Civilizations2009/12/07
  341. Ep. 166: Multiverses2009/11/30
  342. Ep. 165: Doppler Effect2009/11/23
  343. Ep. 164: Inside the Atom2009/11/16
  344. Ep. 163: Auroras2009/11/09
  345. Ep. 162: Edwin Hubble2009/11/02
  346. Ep. 161: Launch Facilities 2009/10/26
  347. Ep. 160: Eclipses 2009/10/19
  348. Ep. 159: Planet X 2009/10/12
  349. Ep. 158: Pulsars 2009/10/05
  350. Ep. 157: Constellations 2009/09/28
  351. Ep. 156: Famous Stars2009/09/21
  352. Ep. 155: Dwarf Stars2009/09/14
  353. Ep. 154: Dragon*Con Live with Seth Shostak2009/09/07
  354. Ep. 153: Dark Skies2009/08/31
  355. Ep. 152: Binary Stars2009/08/24
  356. Ep. 151: Atmospheres2009/08/17
  357. Ep. 150: Telescopes, the Next Level2009/08/10
  358. Ep. 149: Constellation Program2009/08/03
  359. Ep. 148: Astronomy and New Media2009/07/27
  360. Ep. 147: How to Be Taken Seriously By Scientists2009/07/20
  361. Ep. 146: Astronomy Research from Idea to Publication2009/07/13
  362. Ep. 145: Interstellar Travel2009/07/06
  363. Questions Show: Imaging Extrasolar Planets, Infinite Universe, Inside a Black Hole2009/07/02
  364. Ep. 144: Space Elevators2009/06/29
  365. Questions Show: Matter Balance, Jumping Light Speed and Black Hole Star Formation2009/06/25
  366. Ep. 143: Astrobiology2009/06/22
  367. Questions Show: Black black holes, Unbalancing the Earth, and Space Pollution2009/06/18
  368. Ep. 142: Plate Tectonics2009/06/15
  369. Questions Show: Avoiding the Heat Death, Orbiting Galaxies, and the Dangers of Space Radiation2009/06/11
  370. Ep. 141: Volcanoes, Hot and Cold2009/06/08
  371. Questions Show: Galileoscope, Black Hole Time, and What Exactly is Energy?2009/06/04
  372. Ep. 140: Entanglement2009/06/01
  373. Questions Show: Telescope Suggestions, Black Hole Energy, and Universal Time2009/05/28
  374. Ep. 139: Energy Levels and Spectra2009/05/25
  375. Questions Show: An Unlocked Moon, Energy Into Black Holes, and the Space Station's Orbit2009/05/21
  376. Ep. 138: Quantum Mechanics2009/05/18
  377. Questions Show: Hidden Fusion, the Speed of Neutrinos, and Hawking Radiation2009/05/14
  378. Ep. 137: Large Scale Structure of the Universe2009/05/11
  379. Questions Show: The Source of Atmospheres, the Vanishing Moon, and a Glow After Sunset2009/05/07
  380. Ep. 136: Gamma Ray Astronomy2009/05/04
  381. Questions Show: Dangerous Solar Flares, Higgs Boson Insights, and Light Speed Flashlights2009/04/30
  382. Ep. 135: X-Ray Astronomy2009/04/27
  383. Questions Show: NorthEast Astronomy Forum (NEAF)2009/04/23
  384. Ep. 134: Ultraviolet Astronomy2009/04/20
  385. Ep. 133: Optical Astronomy2009/04/13
  386. Questions Show: Undoing Inflation, Searching for Water, and Seeing Everything a Black Hole's Ever Eaten2009/04/09
  387. Ep. 132: Infrared Astronomy2009/04/06
  388. Ep. 131: Submillimeter Astronomy2009/03/30
  389. Questions Show: Decelerating Black Holes, Earth-Sun Tidal Lock, and the Crushing Gravity of Dark Matter2009/03/26
  390. Ep. 130: Radio Astronomy2009/03/23
  391. Questions Show: Multiple Big Bangs, Satellite Collisions and the Size of the Universe2009/03/12
  392. Ep. 129: Interferometry2009/03/09
  393. Questions Show: Shooting Lasers at the Moon and Losing Contact with Rovers2009/03/05
  394. Ep. 128: Dust2009/03/02
  395. Ep. 127: The US Space Shuttle2009/02/16
  396. Ep. 126: From Skeptics Guide with Questions2009/02/09
  397. Ep. 125: A Zoo of Extrasolar Planets2009/02/02
  398. Questions Show: Moons and the Drake Equation, Stars in the Void, and Rings Around Stars2009/01/22
  399. Ep. 124: Space Capsules, Part 1 - Vostok, Mercury and Gemini2009/01/19
  400. Ep. 123: Homogeneity2009/01/12
  401. Ep. 122: How Old is the Universe2009/01/05
  402. Questions Show: Questions Show: Stellar Roche Limits, Seeing Black Holes, and Water on Mars2009/01/01
  403. Ep. 121: Spacesuits2008/12/29
  404. Ep. 120: The Christmas Star2008/12/22
  405. Questions Show: Different Fields of Astronomy, Our Sibling Stars, and Hidden Lagrange Points2008/12/18
  406. Ep. 119: Robots in Space2008/12/15
  407. Questions Show: Distance in Space, Changing Earth's Orbit, and Different Sized Stars2008/12/11
  408. Ep. 118: Sky Surveys2008/12/08
  409. Ep. 117: Time2008/12/01
  410. Ep. 116: Molecules in Space2008/11/24
  411. Ep. 115: The Moon, Part 3: Return to the Moon2008/11/17
  412. Questions Show: Spiral Arms, Seismic Waves on the Sun, and our Favorite Gear2008/11/13
  413. Ep. 114: The Moon, Part 2 - Exploration of the Moon2008/11/10
  414. Questions Show: Ice in Space, Expansion of the Universe, and Death from the Skies2008/11/06
  415. Ep. 113: The Moon, Part 12008/11/03
  416. Questions Show: Orbit of the Planets, Green Stars, and Oort Cloud Contamination2008/10/30
  417. Ep. 112: Death from the Skies, Interview with Phil Plait2008/10/27
  418. Questions Show: Relativity, Relativity and More Relativity2008/10/23
  419. Ep. 111: Nebulae2008/10/20
  420. Questions Show: Galactic Dust, the Speed of Photons, and the Big Bang Calculations2008/10/19
  421. Ep. 110: The Search for Extraterrestrial Intelligence2008/10/13
  422. Questions Show - Alignment with the Galactic Plane, Destruction from Venus, and the Death of the Solar System2008/10/09
  423. Ep. 109: The Life of Other Stars2008/10/06
  424. Questions Show - Running Out of Gravitons and Hitting the Brakes at Light Speed2008/10/02
  425. Ep. 108: The Life of the Sun2008/09/29
  426. Questions Show - light speed, Andromeda galaxy, dark matter and black holes2008/09/26
  427. Ep. 107: Nucleosynthesis: Elements from Stars2008/09/22
  428. Questions Show - Black Hole Surfaces, Magnetic Field Strengths, and the Speed of Gravitons2008/09/18
  429. Ep. 106: The Search for the Theory of Everything2008/09/15
  430. Student Questions Show: Leelanau School2008/09/14
  431. Ep. 105: The Strong and Weak Nuclear Forces2008/09/08
  432. Ep. 104: Science Fiction at Dragon*Con with Plait and Grazier2008/09/01
  433. Ep. 103: Electromagnetism2008/08/25
  434. Ep. 102: Gravity2008/08/18
  435. Ep. 101: Advanced Propulsion Systems2008/08/11
  436. Ep. 100: Rockets2008/08/04
  437. Ep. 99: The Milky Way2008/07/28
  438. Ep. 98: Quasars2008/07/21
  439. Ep. 97: Galaxies2008/07/14
  440. Ep. 96: Humans to Mars, Part 3 - Terraforming Mars2008/07/07
  441. Ep. 95: Humans to Mars, Part 2 - Colonists2008/06/30
  442. Ep. 94: Humans to Mars, Part 1 - The Scientists2008/06/23
  443. Ep. 93: Missions to Mars, Part 22008/06/16
  444. Ep. 92: Missions to Mars, Part 12008/06/09
  445. Ep. 91: The Search for Water on Mars2008/06/02
  446. Ep. 90: The Scientific Method2008/05/26
  447. Ep. 89: Adaptive Optics2008/05/19
  448. Ep. 88: The Hubble Space Telescope2008/05/12
  449. Ep. 87: The End of the Universe Part 2: The End of Everything2008/05/05
  450. Ep. 86: The End of the Universe Part 1: The End of the Solar System2008/04/28
  451. Ep. 85: Detectors2008/04/21
  452. Ep. 84: Getting Around the Solar System2008/04/14
  453. Ep. 83: Wave Particle Duality2008/04/07
  454. Ep. 82: Space Junk2008/03/31
  455. Ep. 81: Questions on the Shape Size and Centre of the Universe2008/03/24
  456. Ep. 80: Craters2008/03/17
  457. Ep. 79: How Big is the Universe?2008/03/10
  458. Ep. 78: What is the Shape of the Universe?2008/03/03
  459. Ep. 77: Where is the Centre of the Universe?2008/02/25
  460. Ep. 76: Lagrange Points2008/02/18
  461. Student Questions: Curtis High School2008/02/16
  462. Ep. 75: Stellar Populations2008/02/11
  463. Ep. 74: Antimatter2008/02/04
  464. Ep. 73: Questions Show #82008/01/28
  465. Ep. 72: Cosmic Rays2008/01/21
  466. Ep. 71: Gravitational Waves 2008/01/14
  467. Ep. 70: How to Win a Nobel Prize2008/01/07
  468. Student Questions: Farmersburg School2008/01/06
  469. Episode 69: The Large Hadron Collider and the Search for the Higgs-Boson2007/12/31
  470. Episode 68: Globular Clusters2007/12/24
  471. Episode 67: Building a Career in Astronomy2007/12/17
  472. Episode 66: How Amateurs can contribute to Astronomy2007/12/10
  473. Episode 65: The End of Our Tour Through the Solar System2007/12/03
  474. Episode 64: Pluto and the Icy Outer Solar System2007/11/26
  475. Episode 63: Neptune2007/11/19
  476. Episode 62: Uranus2007/11/12
  477. Episode 61: Saturn's Moons2007/11/05
  478. Episode 60: Questions on Inflation2007/10/29
  479. Episode 59: Saturn2007/10/22
  480. Episode 58: Inflation2007/10/15
  481. Episode 57: Jupiter's Moons2007/10/08
  482. Episode 56: Jupiter2007/10/01
  483. Episode 55: The Asteroid Belt2007/09/24
  484. Episode 54: Questions Show #62007/09/17
  485. Episode 53: Astronomy in Science Fiction2007/09/10
  486. Special Episode: Panspermia2007/09/04
  487. Episode 52: Mars2007/09/03
  488. Episode 51: Earth2007/08/27
  489. Episode 50: Venus2007/08/20
  490. Episode 49: Mercury2007/08/13
  491. Episode 48: Tidal Forces Across the Universe2007/08/06
  492. Episode 47: Tidal Forces2007/07/30
  493. Episode 46: Stellar Nurseries2007/07/23
  494. Episode 45: The Important Numbers in the Universe2007/07/16
  495. Episode 44: Einstein's Theory of General Relativity2007/07/09
  496. Episode 43: Questions, Questions #52007/07/02
  497. Episode 42: Magnetism Everywhere2007/06/25
  498. Episode 41: The Rise of the Supertelescopes2007/06/18
  499. Episode 40: American Astronomical Society Meeting, May 20072007/06/11
  500. Episode 39: Astrology and UFOs2007/06/04
  501. Episode 38: Neutron Stars and their Exotic Cousins2007/05/28
  502. Episode 37: Gravitational Lensing2007/05/21
  503. Episode 36: Gamma-Ray Bursts2007/05/14
  504. Episode 35: Questions Show #42007/05/07
  505. Episode 34: Discovering Another Earth2007/04/30
  506. Episode 33: Choosing and Using a Telescope2007/04/23
  507. Episode 32: The Search for Neutrinos2007/04/16
  508. Episode 31: String Theory, Time Travel, White Holes, Warp Speed, Multiple Dimensions, and Before the Big Bang2007/04/09
  509. Episode 30: The Sun, Spots and All2007/04/02
  510. Episode 29: Asteroids Make Bad Neighbors2007/03/26
  511. Episode 28: What is the Universe Expanding Into?2007/03/19
  512. Episode 27: The Third Question Show2007/03/12
  513. Episode 26: The Biggest Structures in the Universe2007/03/05
  514. Episode 25: How Galaxies Form2007/02/26
  515. Episode 24: Fermi Paradox2007/02/19
  516. Episode 23: The Drake Equation2007/02/12
  517. Episode 22: Variable Stars2007/02/05
  518. Episode 21: Black Hole Questions Answered2007/01/29
  519. Episode 20: What We Learned from the American Astronomical Society2007/01/22
  520. Episode 19: Comets, Our Icy Friends from the Outer Solar System2007/01/15
  521. Episode 18: Black Holes Big and Small2007/01/08
  522. Episode 17: Where does the Moon Come From?2007/01/01
  523. Episode 16: Across the Electromagnetic Spectrum2006/12/25
  524. Episode 15: Listener Questions Answered2006/12/18
  525. Episode 14: We're All Made of Supernovae2006/12/11
  526. Episode 13: Where do stars go when they die?2006/12/04
  527. Episode 12: Where Do Baby Stars Come From?2006/11/27
  528. Episode 11: A Universe of Dark Energy2006/11/20
  529. Episode 10: Measuring Distance in the Universe2006/11/13
  530. Episode 9: Einstein's Theory of Special Relativity2006/11/06
  531. Episode 8: Meteor Showers. Yes, the sky is falling.2006/10/30
  532. Episode 7: Getting Started in Amateur Astronomy2006/10/23
  533. Episode 6: More Evidence for the Big Bang2006/10/16
  534. Episode 5: The Big Bang and Cosmic Microwave Background2006/10/09
  535. Episode 4: The Search for Dark Matter2006/10/02
  536. Episode 3: Hot Jupiters and Pulsar Planets2006/09/25
  537. Episode 2: In Search of Other Worlds2006/09/18
  538. Episode 1: Pluto's Planetary Identity Crisis2006/09/11
Astronomy Cast
Astronomy Cast brings you a weekly fact-based journey through the cosmos.

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