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Astronomy Cast

Fraser Cain and Dr. Pamela Gay

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Take a fact-based journey through the cosmos. Tune in to hear weekly discussions on astronomical topics ranging from planets to cosmology. Hosted by Fraser Cain (Universe Today) and Dr. Pamela L. Gay (Planetary Science Institute), this show brings the questions of an avid astronomy lover direct to an astronomer. Together Fraser and Pamela explore what is known and being discovered about the universe around us. Astronomy Cast is supported thru patreon.com/AstronomyCast.
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Astronomy Cast Full Raw Feed

Fraser Cain & Dr. Pamela L. Gay

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This is the full live stream audio of the Astronomy Cast episodes. The first half hour is the regular episode, and the second half hour is a Q&A session with questions submitted by live viewers and email.
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Astronomy Cast Ep. 744: Lunar Time By Fraser Cain & Dr. Pamela Gay Streamed live on Feb 10, 2025. What time is it? OK, fine, what time is it on the Moon? The Moon orbits the Earth, so it doesn’t fall into a specific time zone. Also, there’s lower gravity on the surface of the Moon, which changes the rate that clocks tick. Well… It’s time to introdu…
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Streamed live on Feb 10, 2025. What time is it? OK, fine, what time is it on the Moon? The Moon orbits the Earth, so it doesn’t fall into a specific time zone. Also, there’s lower gravity on the surface of the Moon, which changes the rate that clocks tick. Well… It’s time to introduce Lunar Time. When are you when you are on the Moon? Researchers a…
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Streamed live on Feb 3, 2025. Just a few years ago LIGO detected the first direct evidence of gravitational waves coming from colliding black holes. And there you have it. Boom! Black holes collide! But that wasn’t all we learned from gravitational waves, nor will we learn. Sure, the masses of merging black holes are nice to know, but what else can…
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Streamed live on Jan 27, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay Gravity Waves ... not gravitational waves ... move atmospheres and make pretty clouds. Have you ever looked up into the sky and seen bizarre cloud formations that look like waves on the ocean? These are gravity waves. Not to be confused with gravitational waves, and they’re…
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Astronomy Cast Ep. 741: Technosignatures By Fraser Cain & Dr. Pamela Gay Streamed live on Jan 20, 2025. As humanity developed more advanced technology, we’re having a larger effect on our environment. The more we do, the more we could be detectable. And this gives us ideas on how we could detect other civilizations, even if they don’t realize we’re…
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Streamed live on Jan 20, 2025. Pollution will ultimately give away a society. SUPPORTED BY YOU This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. Thanks to: Andrew Poelstra, BogieNet, Brian Cagle, David, David Truog, Ed, Gerhard, Schwarzer, Jeanette Wink, Sigg…
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Astronomy Cast Ep. 740: Sneaky Stars! By Fraser Cain & Dr. Pamela Gay Streamed live on Jan 13, 2025. Why stars can’t be trusted! If you’re an astronomer you depend on accurate observations of stars, but there’s a problem. Stars are sneaky! Changing in size, brightness, color, they hide their chemistry, their age and even their companions from all b…
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Streamed live on Jan 13, 2025. Why stars can’t be trusted! If you’re an astronomer you depend on accurate observations of stars, but there’s a problem. Stars are sneaky! Changing in size, brightness, color, they hide their chemistry, their age and even their companions from all but the cleverest observers. Stars explode precisely when they intend t…
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Astronomy Cast Ep. 740: Drones! By Fraser Cain & Dr. Pamela Gay Streamed live January 9, 2025. From little Ingenuity to the future Firefly and all our Earth Science fliers, let's look at the buzzy scientists. NASA’s Mars Ingenuity helicopter showed us how wonderful a flying science platform can be on another world. Soon there’ll be a helicopter fly…
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Streamed live January 9, 2025. From little Ingenuity to the future Firefly and all our Earth Science fliers, let's look at the buzzy scientists. NASA’s Mars Ingenuity helicopter showed us how wonderful a flying science platform can be on another world. Soon there’ll be a helicopter flying on Titan, but there are many other flying robots that’ll be …
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Streamed live December13, 2024. Hosted by: Fraser Cain and Dr. Pamela L. Gay. 2024 was a strange year! I’ll let your imagination take flight and consider how 2024 was weird for you. But, for space and astronomy we had some interesting, revolutionary, unsettling and downright weird stories pop up. Today let’s talk about them.…
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Astronomy Cast Ep. 736: Gift Guide 2024 By Fraser Cain & Dr. Pamela Gay Streamed live on Dec 2, 2024 It’s time for our Holiday Gift Guide, where we suggest ideas for presents for the space fans in your life! What books are we reading? What games are we playing and what telescopes are we admiring? SUPPORTED BY YOU !!! This Episode is made possible t…
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Streamed live on Dec 2, 2024 Hosted by: Fraser Cain and Dr. Pamela L. Gay It’s time for our Holiday Gift Guide, where we suggest ideas for presents for the space fans in your life! What books are we reading? What games are we playing and what telescopes are we admiring? SUPPORTED BY YOU !!! This Episode is made possible thanks to our Patrons on Pat…
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Astronomy Cast Ep. 735: Albert Einstein By Fraser Cain & Dr. Pamela Gay Streamed live on Nov 25, 2024. Last week we talked about the Einstein probe. So this week it is only natural that we talk about the man himself, Albert Einstein. He revolutionized the field of physics, played a vital role in the early 20th century and struggled to unite the for…
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Streamed live on Nov 25, 2024. Last week we talked about the Einstein probe. So this week it is only natural that we talk about the man himself, Albert Einstein. He revolutionized the field of physics, played a vital role in the early 20th century and struggled to unite the forces of the Universe at the end of his career. Hosted by: Fraser Cain and…
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