AaS! 54: What Happens When Galaxies Collide?
Ask a Spaceman!18 Huhti 2017

AaS! 54: What Happens When Galaxies Collide?

What happens during a galaxy merger event? Is dark matter involved? How do we use simulations to learn about these processes that last hundreds of millions of years? I discuss these questions and more in today's Ask a Spaceman!

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Big thanks to my top Patreon supporters this month: Justin G., Kevin O., Anne B., Justin R., Helge B., Tim R., Michael C., Mathieu B., Lars H., Ray S., James L., Mark R., Alan M., David B., and Silvan W.!

Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing.

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

Jaksot(276)

AaS! 14: What Is Spacetime? (Part 1)

AaS! 14: What Is Spacetime? (Part 1)

What is spacetime? What was the breakthrough idea that led Einstein to develop Special Relativity? Who was right: Newton or Maxwell? I discuss these questions and more in today's Ask a Spaceman! Suppo...

4 Elo 201540min

AaS! 13: What the Heck Is a Magnetar?

AaS! 13: What the Heck Is a Magnetar?

What's the difference between a neutron star and a magnetar? How do you make a neutron star? How do they get so magnetic? I discuss these questions and more in today's Ask a Spaceman! Support the show...

21 Heinä 201532min

AaS! 12: Is Life Possible Around Binary Stars?

AaS! 12: Is Life Possible Around Binary Stars?

Is Tatooine from Star Wars possible? What kind of binary stars are allowed? What would life be like around binary stars? I discuss these questions and more in today's Ask a Spaceman! Support the show:...

7 Heinä 201534min

AaS! 11: What Do We Do in Space?

AaS! 11: What Do We Do in Space?

What kind of experiments do we do in space? Why do we even bother? Is there any benefit to having telescopes in orbit instead of on the ground? I discuss these questions and more in today's Ask a Spac...

16 Kesä 201539min

AaS! 10: How Do Black Holes Form?

AaS! 10: How Do Black Holes Form?

How do black holes form? Why are there only two sizes (Small and Big Gulp)? How do we know black holes exist, and what purpose do they serve in the universe? I discuss these questions and more in toda...

2 Kesä 201540min

AaS! 9: How Big Is the Universe?

AaS! 9: How Big Is the Universe?

How big is the universe? What's outside the universe, and what are we expanding into? Can it even be put into words? I discuss these questions and more in today's Ask a Spaceman! Support the show: htt...

19 Touko 201539min

AaS! 8: Will a Comet Kill Us All?

AaS! 8: Will a Comet Kill Us All?

What are the chances of a comet hitting the earth? What other stuff can fall from space? What would the effects be, and how much do we need to worry? I discuss these questions and more in today's Ask ...

5 Touko 201538min

AaS! 7: How Do We Know That Dark Matter Exists?

AaS! 7: How Do We Know That Dark Matter Exists?

How do we know that dark matter exists? Are you sure that scientists aren't just making things up because they're lazy? What makes it dark anyway? I discuss these questions and more in today's Ask a S...

21 Huhti 201529min

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