AaS! 20: How Much Light Is in the Universe?
Ask a Spaceman!17 Nov 2015

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!

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Keep those questions about space, science, astronomy, astrophysics, and cosmology coming to #AskASpaceman on Twitter@PaulMattSutter and Facebook/PaulMattSutter for COMPLETE KNOWLEDGE OF TIME AND SPACE! Music by Jason Grady and Nick Bain.

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AaS! 250: Where Do the Constants of Nature Come From? Part 2

AaS! 250: Where Do the Constants of Nature Come From? Part 2

Part 2 of 2! What are the modern constants of nature? Is the universe fine-tuned for life? Does the multiverse or string theory explain the origins of the constants? I discuss these questions and more...

17 Juni 202533min

AaS! 249: Where Do the Constants of Nature Come From? Part 1

AaS! 249: Where Do the Constants of Nature Come From? Part 1

Part 1 of 2! How do fundamental constants appear in physics? Why are they so important? Why do we care where they come from? I discuss these questions and more in today's Ask a Spaceman! Support the s...

3 Juni 202536min

AaS! 248: What's Going on Inside Neutron Stars?

AaS! 248: What's Going on Inside Neutron Stars?

What's inside a neutron star? What strange states of matter do we encounter? And what mysteries will we find deep in the core? I discuss these questions and more in today's Ask a Spaceman! Support the...

20 Maj 202532min

AaS! 247: How Can We Get Giant Black Holes in the Early Universe?

AaS! 247: How Can We Get Giant Black Holes in the Early Universe?

How do we explain the giant black holes appearing in the young universe? Is it possible to directly collapse a black hole, skipping the formation of stars? What does ultraviolet radiation have to do w...

6 Maj 202528min

AaS! 246: What is Stephen Hawking's Legacy?

AaS! 246: What is Stephen Hawking's Legacy?

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 Apr 202536min

AaS! 245: What Made the Moon?

AaS! 245: What Made the Moon?

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 Apr 202525min

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

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! Support the show: http:/...

18 Mars 202528min

AaS! 243: So Is the Warp Drive Legit or Not?

AaS! 243: So Is the Warp Drive Legit or Not?

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 Mars 202531min

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