on November 6, 2016
Take a facts-based journey through the cosmos with hosts Fraser Cain & Pamela Gay . Learn not just what we know but how we know it. Watch live on YouTube .
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Ep. 535: Astronomy-Related Things To Do This Summer
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
It's summertime, and time for our annual Astronomy Cast hiatus. But that doesn't mean that the astronomy adventure has to end. Today we'll give you some tips and tricks for astronomy summer adventures.
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Astronomy Cast Ep. 534: Modern South African Astronomy
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Last week we talked about some ancient south African astronomy, so this week we'll talk about the state of modern astronomy in the southern part of Africa, which happens to be a great place with nice dark skies and a great view into the heart of the galaxy.
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Astronomy Cast Ep. 533: Indigenous South African Astronomy
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Let's move to another continent this week, and look at the astronomy that was going on in southern Africa in ancient times.
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Astronomy Cast Ep. 532: Modern Astronomy of Australia
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Last week we talked about how well the indigenous Australians followed the night sky. Well, it turns out, Australia is still an amazing place for astronomy. There are so many powerful observatories in Australia, and even more in the works.
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Astronomy Cast Ep. 531: Australian Indigenous Astronomy
This week, we focus on the archaeoastronomy of another part of the world, this time from the indigenous people of Australia. Another group of people whose lives depended on knowing what was happening in the sky from season to season.
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Astronomy Cast Ep. 529 & 530: Astronomy of the Andes: Then and Now
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Astronomy Cast Ep. 528: Modern Astronomy of the American Southwest
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Last week we talked about the ancient astronomy of the American Southwest. But this is actually Pamela's stomping grounds, and she's spent many a night perched atop mountains in this region staring in the night sky with gigantic telescopes. How does astronomy get done in this region today?
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Astronomy Cast Ep. 527: Ancient Astronomy of the American Southwest
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Ancient peoples had no light pollution, and they knew the night skies very well. In fact, they depends on them to know when to plant and when to harvest. Today Pamela talks about the archeoastronomical sites of the American Southwest.
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Astronomy Cast Ep. 526: Event Horizon Telescope and the Black Hole at M87
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Today, of course, we're going to talk about the announcement from the Event Horizon Telescope and the first photograph of a black hole's event horizon.
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Astronomy Cast Ep. 525: 100 Years of IAU
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Even though they might be scattered around our planet, astronomers have way to come together to work out issues that face their entire field of study. It's called the International Astronomical Union, and they're the ones who work out the new names for stars, and sometimes de-planet beloved Kuiper Belt Objects.
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Astronomy Cast Ep. 524: Judging Age & Origins, part 3: Beyond Our System
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
We learned how to figure out the ages of objects in the Solar System, now we push out into the deeper Universe. What about stars, galaxies, and even the Universe itself? How old is it?
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Astronomy Cast Ep. 523: Judging Age & Origins - Pt. 2 Across the Solar System
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Today we push our aging curiosity out into the Solar System to ask that simple question: how old is it and how do we know? What techniques do astronomers use to age various objects and regions in the Solar System?
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Astronomy Cast Ep. 522: Judging Age & Origins - Pt. 1 Earth Rocks
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
People always want to know how old everything is. And more specifically, they want to know how we know how old everything is. Well, here at Astronomy Cast, it's our job to tell you now only what we know, but how we know what we know. And today we'll begin a series on how we know how old everything is.
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Astronomy Cast Ep. 521: The Deep Space Network
We always focus on the missions, but there's an important glue that holds the whole system together. The Deep Space Network. Today we're going to talk about how this system works and how it communicates with all the spacecraft out there in the Solar System.
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
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Astronomy Cast Ep. 519 & 520: Transients: What They Are and Why They Matter
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Welcome to this double-feature on Transients!
Astronomers have found that sometimes the Universe changes. Things move, things explode, things get brighter or dimmer. In fact, knowing this has helped astronomers discover some very important aspects of the Universe. Today we begin a two part series on Transients and their role in astronomy.
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Astronomy Cast Ep. 518: When the Universe tried to Declare War
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
We always say the Universe is trying to kill us. But there was this one time, when the Universe used our own fear of nuclear attack against us, nearly setting off a global nuclear war. Nice try Universe, we're on to you now.
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Astronomy Cast Ep. 517: Fritz Zwicky and the Zwicky Transient Facility
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
One of the most influential astronomers in the 20th Century was Fritz Zwicky. He had his hand in the discovery of dark matter, gravitational lensing, supernovae and neutron stars. And he also worked on a few more controversial ideas like, uh, tired light. Let's learn more about Zwicky.
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Astronomy Cast Ep. 516: Polar Vortices
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
It's cold right now. Okay, fine, here on Vancouver Island, it's actually pretty warm. But for the rest of Canada and big parts of the US, it's terrifyingly cold. Colder than Mars or the North Pole cold. This is all thanks to the break up of the polar vortex. What are polar vertices, how do they form, and where else to we find them in the Solar System?
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Astronomy Cast Ep. 515: Space Radiation
Space is a hostile environment in so many ways. But one of its worst features is the various kinds of radiation you can find. When astronauts go back beyond the protective environment of the Earth's magnetosphere, what are the various kinds of radiation they'll encounter. And is there anything we'll be able to do about it?
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Astronomy Cast Ep. 514: Planetary Protection Protocols
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
As we send rovers and landers to other worlds, we have to think about the tiny microbial astronauts we're sending along with us. In fact, NASA is so concerned about infecting other worlds that it has established the planetary protection protocols. Just to be safe.
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Astronomy Cast Ep. 513: Stellar Fusion
The Sun. It's a big ball of fire, right? Apparently not. In fact, what's going on inside of the Sun took us some time and knowledge of physics to finally figure out: stellar fusion. Let's talk about the different kinds of fusion, and how we're trying to adapt it to generate power here on Earth.
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Astronomy Cast Ep. 512: Direct Imaging of Exoplanets
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Finding planets is old news, we now know of thousands and thousands of the places. But the terrible irony is that we can only see a fraction of the planets out there using the traditional methods of radial velocity and transits. But the new telescopes will take things to the next level and image planets directly.
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Astronomy Cast Ep. 511: Predictions for 2019
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
We did it, we made it through 2018 in space. Now let's look forward to the incredible launches, discoveries and astronomical events happening in 2019.
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Astronomy Cast Ep. 510: 2018 - Year in Review
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
2018 was an incredible year in space news. Rockets launched, landers landed, spacecraft were born and died. We learned tremendous new things about Universe around us, and today we're here to look back fondly over the last 12 months to review the year in space that was.
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Astronomy Cast Ep. 509: Fiction to Fact: 3D Printers
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
The technology of 3D printing is taking off. From tiny home-based 3D printers to larger manufacturing. And of course, 3D printing is going to space with the International Space Station and beyond.
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Astronomy Cast Ep. 508: 2018 Holiday Gift Guide
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
We did it, we made it to the end of another year. Once again it's time to wonder what gifts to get your beloved space nerds. We've got some suggestions. Some are brand new this year, others are classics that we just can't help but continue to suggest. Let's get into it.
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Astronomy Cast Ep. 507: From Fiction to Fact : Ion Drive
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Ion engines are a mainstay of science fiction, featured in both Star Trek and Wars. But this is a very real technology, successfully used on several missions out there in the Solar System right now. How do they work and what are the limits?
Astronomy Cast Ep. 506: It's not Aliens, Unless it's Aliens
Did you hear that astronomers from Harvard think that the interstellar asteroid Oumuamua was actually an alien solar sail? Is it aliens? Of course it's not aliens. But some day, it'll actually be aliens.
Fraser Cain and Pamela Gay recorded this together without a live video. So this episode, we only have audio. But check out our channel for our normal Astronomy Cast episodes, live on Fridays!
Astronomy Cast Ep. 505: Seismology
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
We're always interested in the surface features of the planets and moons in the Solar System, but that's only skin deep. It turns out, these worlds have an interesting inner life too. Thanks to the science of seismology, we can peer into our planet and learn how it works... inside. And we're about to take that technology to Mars.
Astronomy Cast Ep. 504: Radar, Lidar & Sonar
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
To really study something, you want to reach out and touch it. But what can you do if you're separated by a huge distance? You reach out with electromagnetic or sound waves and watch how they bounce back. Thanks to radar, sonar and lidar.
Astronomy Cast Ep. 503: Gravity Mapping
The Earth looks like a perfect sphere, but down here on the surface we see that there are mountains, rivers, oceans, glaciers, all kinds of features with different densities and shapes. Scientists can map this produce a highly detailed gravity map of our planet. And it turns out, this is very useful for other worlds too.
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Astronomy Cast Ep. 502: No Touching: Determining Composition of Worlds Remotely
How do you know what something is made of if you can't reach out and touch it? How do we know what planets lights years away have in their atmosphere? What about the rocks all around Curiosity? Or the geysers coming out of Europa and Enceladus? Scientists have a few handy tricks.
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
Astronomy Cast Ep. 501: Water Worlds Revisited
Join +Fraser Cain and +Pamela Gay for a live episode of Astronomy Cast. We'll record our 30-minute show, and then stay tuned for them to answer questions!
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?
Astronomy Cast Ep. 500: Live Celebration!
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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.
Astronomy Cast celebrated their 500th episode on Sept 15-16, 2018. We broadcast from our celebration, in front of a live audience! And we debuted our new theme music by composer, fan and friend David Joseph Wesley!
Astronomy Cast Ep. 500: Preshow
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We're celebrating over 11 years of Astronomy Cast with this special recording of our 500th episode in front of a live audience in Edwardsville, IL - home of CosmoQuest!
Astronomy Cast Ep. 499: What is the proposed Hubble-Lemaitre Law?
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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.
Astronomy Cast Ep. 498: Dwarf Galaxy Update
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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.
Astronomy Cast Ep. 497: Update on Globular Clusters
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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.
Astronomy Cast Ep. 496: Update on Stellar Populations (I, II, & III)
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Another update show, this time on the various generations of stars, let's get into it.
Astronomy Cast Ep. 495: Update on Asteroids & Prospects of Asteroid Mining
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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?
Astronomy Cast Ep. 494: Icy Moons Update 2018
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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?
Astronomy Cast Ep. 493: Mars Update 2018
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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?
Astronomy Cast Ep. 492: Comets, Asteroids and KBO's
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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?
Astronomy Cast Ep. 491: Exoplanet Update 2018
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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.
Astronomy Cast Ep. 490: What's New with Supernovae
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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.
Astronomy Cast 489: Black Hole Update
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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.
Astronomy Cast 488: Dark Energy, 2018 Edition
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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?
Astronomy Cast 487: Dark Matter, 2018 Edition
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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
Astronomy Cast 486: Particle Physics Update
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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.
Astronomy Cast 485: Docking, Refueling, Transferring
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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.
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