AaS! 25: How Do We Know How Far Away Stuff Is...Far Away?

How do you measure the impact of a scientist? Does Stephen Hawking compare to Newton or Einstein? What were his contributions to black holes, the big bang, and quantum gravity? I discuss these questio...

22 Huhti 202536min

Why is the moon so special? Why do we think a giant impact created it? Why didn't the same thing happen to other planets? I discuss these questions and more in today's Ask a Spaceman! Support the show...

8 Huhti 202525min

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! Support the show: http:/...

18 Maalis 202528min

What is an Alcubierre warp drive? What would it take to make it work? Could it propel spacecraft even below the speed of light? I discuss these questions and more in today's Ask a Spaceman! Support th...

4 Maalis 202531min

What is an axion? How could axions make a star, and what does that have to do with dark matter? What would these stars look like? I discuss these questions and more in today's Ask a Spaceman! Support ...

18 Helmi 202535min

Where do parallel universes exist? Could we use wormholes to travel to them? What does time travel have to do with all this? I discuss these questions and more in today's Ask a Spaceman! Support the s...

4 Helmi 202532min

What is the Fermi Paradox? How rare is non-intelligent vs intelligent life? What are the challenges a species must overcome to colonize the galaxy? Where is everybody? I discuss these questions and mo...

21 Tammi 202526min

Are dark photons as sinister as they sound? What did the curvaton do in the early universe? And is everything really made of preons? I discuss these questions and more in today's Ask a Spaceman! Suppo...

7 Tammi 202538min