AaS! 106: How Do We Measure the Expansion of the Universe?
Ask a Spaceman!18 Jun 2019

AaS! 106: How Do We Measure the Expansion of the Universe?

What's the deal with redshift? How can we actually interpret velocities when it comes to cosmic expansion? And what's with the recent tension over measuring the expansion rate? I discuss these questions and more in today's Ask a Spaceman!

Support the show: http://www.patreon.com/pmsutter
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Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE!

Big thanks to my top Patreon supporters this month: John, Matthew K, Helge B, Justin Z, Matt W, Justin G, Kevin O, Duncan M, Corey D, Kirk B, Barbara K, Neuterdude, Chris C, Erik M, Steve C, Digitalneo, Erik M, Tim R, Neil L, Gordon M, Joe R, Neil P, Gabriella G, Tom S, Bryan D, Irene P, Dustin R, Matt C, Iothian53, Steve P, Debra S, Ken L, Alberto M, Ron W, Chris L, Mark R, Alan B, Stephen J, David P, John F, Maureen R, Frank T, Craig B, Jesse A, Ron S, Steven L, Mark R, Ulfert B, Dave L, Stace J, S Stark, Richard K, Vladimir Z, Carol S, Stephen M, Grace M, Jeremy K, Russell W, Thomas S, David B, Tamara F, Robert B, Fr Bruce W, Catherine R, Nicolai B, Sean M, Nate H, and Edward K!

Music by Jason Grady and Nick Bain. Thanks to Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, and the one and only Agent to the Stars (http://www.pmsutter.com).

Episoder(273)

AaS! 24: What's the Beef With Quantum Gravity?

AaS! 24: What's the Beef With Quantum Gravity?

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19 Jan 201645min

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 Jan 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 Des 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 Des 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 Des 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 Nov 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 Nov 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 Nov 201531min

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