AaS! 244: What's the Most Important Wavelength in All Astronomy?
Ask a Spaceman!18 Maalis 2025

AaS! 244: What's the Most Important Wavelength in All Astronomy?

What is 21-cm radiation? What (and who) produces it? What causes it, and what does it tell us about the universe? I discuss these questions and more in today's Ask a Spaceman!

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Hosted by Paul M. Sutter.

Jaksot(272)

Aas! 23: What's Up With Exoplanets?

Aas! 23: What's Up With Exoplanets?

What's up with exoplanets? What's the variety, and how do we detect them? How did Hot Jupiters get so hot, anyway? Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpace...

5 Tammi 201639min

AaS! Transient Special: What was the Christmas star?

AaS! Transient Special: What was the Christmas star?

It’s a special “transient” edition! What was the Christmas Star? Follow all the show updates at askaspaceman.com and support the show at patreon.com/pmsutter. Keep those questions about space, science...

22 Joulu 20158min

AaS! 22: Question Bonanza!

AaS! 22: Question Bonanza!

It's a BONANZA! Featuring many questions from a live event, including: Is time travel possible? Can a galaxy eat itself? Will we ever run out of stars? And so much more! Support the show: http://www.p...

15 Joulu 201559min

AaS! 21: Are We Really Made of Stars?

AaS! 21: Are We Really Made of Stars?

Are we really made of stars? How do we know? What does it mean for us? Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Watch on YouTube: h...

1 Joulu 201528min

AaS! 20: How Much Light Is in the Universe?

AaS! 20: How Much Light Is in the Universe?

How much light is in the universe? What's a "photon"? What's the brightest thing out there? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patreon.com/pmsut...

17 Marras 201529min

AaS! Special: What did you think of The Martian?

AaS! Special: What did you think of The Martian?

It’s a super-special episode, featuring a discussion with me, my “Space in your Face” co-hosts Wayne Schlingman and Anna Nierenberg, and Laura Aurenschield from the Columbus Dispatch about our thought...

12 Marras 201533min

AaS! 19: How Do Planets Get Magnetic Fields?

AaS! 19: How Do Planets Get Magnetic Fields?

How do planets get their magnetic fields? What's a dynamo? What do magnetic fields have in common with plate tectonics? I discuss these questions and more in today's Ask a Spaceman! Support the show: ...

3 Marras 201531min

AaS! 18: Is the Universe Dying?

AaS! 18: Is the Universe Dying?

Is the universe dying? What is the ultimate fate of the universe? Will it transform into something else? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patr...

20 Loka 201542min

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