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PODCAST

365 Days of Astronomy - Weekly Edition

Fraser Cain & Dr. Pamela L. Gay

The weekly podcast from the International Year of Astronomy 2009. This podcast comes out weekly and includes each daily episode of the 365 Days of Astronomy Podcast.

science & medicine natural sciences

All Episodes

01:03:35

Ep. 682: Ultra-Diffuse Galaxies & Dark Matter

365 Days of Astronomy - Weekly Edition ·

2023/05/22

Astronomers first noticed the strange behaviors of rotating galaxies almost 100 years ago, suggesting there’s an invisible dark matter hold them together with gravity. Or maybe we just don’t understand how gravity works at the largest scales. Observations are much better now, and astronomers have found examples of galaxies that are almost entirely made of dark matter. Does this tell us anything?

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37:53

Ep. 681: Kilonovae

365 Days of Astronomy - Weekly Edition ·

2023/05/15

In 2017, astronomers detected the gravitational waves and electromagnetic radiation from colliding neutron stars. This had been long theorized as one of the causes of a certain type of gamma-ray burst. By studying the event and its afterglow, astronomers have learned a tremendous amount about the formation of the heaviest elements in the Universe.

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58:51

Ep. 680: Rogue Black Holes

365 Days of Astronomy - Weekly Edition ·

2023/05/08

Last week we talked about rogue stars. This week we’re going to take things up a notch and talk about an even more extreme event. Rogue black holes. Astronomers recently discovered a supermassive black hole on an escape trajectory, leaving newly forming stars in its wake. It’s wonderful, terrible, nightmare fuel.

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01:02:37

Ep. 679: High(per) Velocity Stars

365 Days of Astronomy - Weekly Edition ·

2023/05/01

Most stars in the Milky Way are trapped in here with us, doomed to orbit around and around and around. But a few have found a way out, an escape into the freedom of intergalactic space. How do stars reach escape velocity, never to return?

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01:00:12

Ep. 678: World Building: Planet Formation, Growth &...

365 Days of Astronomy - Weekly Edition ·

2023/04/24

Okay sci-fi writers, today we’re going to give you a guided tour of building planets. How they form, how they grow, and how things can go horribly horribly wrong. [Editor’s Note: Google HL Tau, click on the Wikipedia link and see planets forming!]

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01:03:13

Ep. 677: The Answer is Always Dust

365 Days of Astronomy - Weekly Edition ·

2023/04/17

Whenever astronomers discover something surprising, the answer often turns out to be dust. Dust obscuring our view, dust changing the polarity, dust warming things up, dust cooling things down. It’s always dust. Until it isn’t.

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01:02:45

Ep. 676: Other Things With Rings

365 Days of Astronomy - Weekly Edition ·

2023/04/10

We’ve spent a lot of time gushing about Saturn’s rings, but there are other places with ring systems. And not just Jupiter and the ice giants, but asteroids, dwarf planets, centaurs and even exoplanets. Today let’s gush about them!

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01:03:13

Ep. 675: Exotic Forms of Ice

365 Days of Astronomy - Weekly Edition ·

2023/04/03

Ice is ice, right? You know, what you get when water freezes. Well, maybe here on Earth. But across the Universe, water can be squeezed together at different temperatures and pressures, leading to very different structures. Today we’ll talk about the different forms that ice can take.

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58:08

Ep. 674: Asteroid Early Warning Systems

365 Days of Astronomy - Weekly Edition ·

2023/03/27

The asteroid apocalypse is one of those existential crises that keep astronomers up at night. But the DART mission showed us that we can push an asteroid off its trajectory if we have enough warning. Today we’ll talk about how humanity is building early warning systems to give us time to respond to a dangerous asteroid.

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01:00:19

Ep. 673: How to See Satellites (or Avoid Seeing Them)

365 Days of Astronomy - Weekly Edition ·

2023/03/20

If you’re in dark skies and look up, you’re certain to see a satellite. Lots of them. But how can you know which one you’re seeing, and how can you improve your chances of a sighting? Today we’ll talk about how to see satellites, or avoid seeing them.

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01:02:34

Ep. 672: Space Debris Removal

365 Days of Astronomy - Weekly Edition ·

2023/03/13

We’ve talked about the rising problem of space junk. Okay, we know it’s an issue. So what can be done about it? Today we’ll talk about ideas to remove space junk, making sure space is open to use for the centuries to come.

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48:09

Ep. 671: The Consequences to Breaking Space Laws

365 Days of Astronomy - Weekly Edition ·

2023/03/06

Last week we talked about the laws that govern space exploration. This week the rubber hits the road. What are the consequences for actually breaking these rules? Are they really going to stop anyone?

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58:38

Ep. 670 - Governing Space: The 1967 Outer Space...

365 Days of Astronomy - Weekly Edition ·

2023/02/20

Streamed live on Feb 13, 2023. The Universe was inaccessible for most of human history, but the first tentative steps to space in the 20th Century made humanity realize that science fiction was becoming science reality. New rules would have to be written to govern how we used this limitless expanse. Today we’ll talk about the Outer Space Treaty of 1967.

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01:00:22

Ep. 669: Challenges to Dark Energy

365 Days of Astronomy - Weekly Edition ·

2023/02/13

It’s been over 20 years since astronomers first discovered that the expansion of the Universe is accelerating thanks to dark energy. And in these decades, astronomers still don’t have much evidence for what could be causing the increased expansion rate. Maybe there’s something else going on to explain it.

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59:24

Ep. 668: The Crisis In Cosmology

365 Days of Astronomy - Weekly Edition ·

2023/02/06

Astronomers have made extremely accurate measurements of the expansion rate of the Universe and come up with different results. And the error bars for the observations don’t overlap, so there’s something strange going on. What’s the answer and how can the Crisis in Cosmology be resolved?

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01:01:25

Ep. 667: JWST First Science

365 Days of Astronomy - Weekly Edition ·

2023/01/30

Astronomers came together in January to present their newest research. And not surprisingly, the winter AAS meeting was heavy on news from the James Webb Space Telescope. What were some of the new results that were announced?

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01:01:17

Ep. 666: Solar System References to the Underworld

365 Days of Astronomy - Weekly Edition ·

2023/01/23

Well, we did it. We made it to episode 666, an auspicious number to be sure. What can we do to celebrate this accomplishment? An episode all about things in the Universe that have been named after mythological people and places in the underworld!

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58:22

Ep. 665: The Age of Reionization

365 Days of Astronomy - Weekly Edition ·

2023/01/16

The Cosmic Microwave Background Radiation tells us so much about the Universe. After that era, the Universe went dark. Then, as gas pulled together into the first stars and eventually galaxies, light returned, beginning the Age of Reionization.

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01:00:25

Ep. 664: The First Stars

365 Days of Astronomy - Weekly Edition ·

2023/01/09

The Sun is a third-generation star, polluted with metals from long-dead suns. Astronomers have also discovered second-generation stars, with very low metallicity. But theories suggest there must be a first generation, with stars made from only pure hydrogen and helium. Can we ever find them?

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59:26

Ep. 663: End of Year Observing Events

365 Days of Astronomy - Weekly Edition ·

2022/12/19

We generally save our stargazing suggestions for the summer, when it’s warmer in the northern hemisphere. But you’re tough, you can handle a little cold. And it’s worth it because there are some wonderful things you can see in the night sky this time of year.

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466 results

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