Ask a Spaceman!

What would happen if you fell into a black hole? How big is the universe? Just what the heck is a quasar, anyway? You've got questions, and astrophysicist Paul Sutter has the answers! Submit questions via Twitter using #AskASpaceman or post to facebook.com/PaulMattSutter. Every week you will come closer to COMPLETE KNOWLEDGE OF TIME AND SPACE!

http://www.askaspaceman.com

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AaS! 007: 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 Spaceman!

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


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 2015-04-21  29m