Podcast Episodes

AaS! 245: What Made the Moon?

Episode 245

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!

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Published on 5 months ago

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

Episode 244

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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Published on 5 months, 3 weeks ago

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

Episode 243

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!

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Published on 6 months ago

AaS! 242: Are There Invisible Stars in the Universe?

Episode 242

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!

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Published on 6 months, 3 weeks ago

AaS! 241: Could We Travel to Parallel Universes?

Episode 241

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!

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Published on 7 months ago

AaS! 240: Does the Great Filter Explain Why We’re Alone?

Episode 240

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 m…

Published on 7 months, 2 weeks ago

AaS! 239: What Are the Weirdest Hypothetical Particles?

Episode 239

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!

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Published on 8 months ago

AaS! 238: What Makes the Sun’s Corona So Dang Hot?

Episode 238

How can the solar corona be hotter than the surface? What has the Parker Solar probe learned so far? What do magnetic fields have to do with all this? I discuss these questions and more in today’s As…

Published on 8 months, 3 weeks ago

AaS! 237: Could Any Supernova Harm the Earth?

Episode 237

Are we “in range” of any potential supernovae? Has the Earth ever been hit in the past? And what about gamma-ray bursts from across the galaxy, are we safe from those? I discuss these questions and m…

Published on 9 months ago

AaS! 236: How Exactly Do Black Holes Merge?

Episode 236

How do black holes get close enough to merge? What causes them to emit gravitational waves, and where do the waves come from? What does the merger process look like? I discuss these questions and mor…

Published on 9 months, 3 weeks ago