AaS! 4: Are There Aliens...Out There?
Ask a Spaceman!20 Feb 2015

AaS! 4: Are There Aliens...Out There?

Are there aliens...you know, out there? What are the chances of life appearing somewhere, anywhere, in the universe? Will we get to say "hi" and have a chat? Is there any life in our own solar system (uh, besides on earth)? I discuss these questions and more in today's Ask a Spaceman!

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Episoder(274)

AaS! 260: What's the Big Deal with the Weak Force?

AaS! 260: What's the Big Deal with the Weak Force?

How did we discover the weak nuclear force? Why is it so strange compared to the other forces? What do mirrors have to do with all of this? I discuss these questions and more in today's Ask a Spaceman...

18 Nov 202531min

AaS! 259: Where Exactly is the Edge of the Universe?

AaS! 259: Where Exactly is the Edge of the Universe?

Is the universe infinite? What about the cosmological horizons, the limits to what we can see? Will we ever know for sure what's beyond them? I discuss these questions and more in today's Ask a Spacem...

4 Nov 202523min

AaS! 258: What's Going to Happen After the ISS?

AaS! 258: What's Going to Happen After the ISS?

Why did we develop the International Space Station in the first place? What have we learned in its 25+ years of operation? When is it coming down, and why? And what's coming up next? I discuss these q...

21 Okt 202532min

AaS! 257: How Does One Go About Smashing Particles?

AaS! 257: How Does One Go About Smashing Particles?

How do particle colliders work? What kinds of energies are we talking about? Are there any uses for colliders except for physics experiments? I discuss these questions and more in today's Ask a Spacem...

7 Okt 202527min

AaS! 256: What Can Gravitational Waves Teach Us About the Big Bang?

AaS! 256: What Can Gravitational Waves Teach Us About the Big Bang?

What are some sources of gravitational waves that aren't black holes? How did inflation create gravitational waves? How can we possibly detect them? I discuss these questions and more in today's Ask a...

23 Sep 202534min

AaS! 255: How Do the Biggest Stars Get So Big?

AaS! 255: How Do the Biggest Stars Get So Big?

How do we measure the sizes of stars? What are the biggest ones today, and how big could stars have gotten in the past? Is there any way for a star to cheat and get even bigger? I discuss these questi...

9 Sep 202531min

AaS! 254: How Do Variable Stars, You Know, Vary?

AaS! 254: How Do Variable Stars, You Know, Vary?

What powers Cepheid variable stars? What about Mira variables and pulsating stars? And are there variable stars that don't actually vary at all? I discuss these questions and more in today's Ask a Spa...

19 Aug 202525min

AaS! 253: What Does Outer Space Sound Like?

AaS! 253: What Does Outer Space Sound Like?

What would the Sun sound like if we could hear it? Does any noise at all happen in the universe? What's the biggest sound of all? I discuss these questions and more in today's Ask a Spaceman! Support ...

5 Aug 202531min

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