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

What makes Iceland so warm despite its high latitude? What powers everything from glaciers to geysers? How are the aurora connected to volcanoes? I discuss these questions and more in today's Ask a Sp...

6 Mars 201831min

Why are small stars red? Why are small stars so common? Why are small stars so interesting for the hunt for life? I discuss these questions and more in today's Ask a Spaceman! Support the show: http:/...

20 Feb 201826min

What did Hubble really discover? Why does redshift imply an expanding universe? Why is the night sky dark? Why is there so much hydrogen, and how is that connected to the Big Bang? I discuss these que...

6 Feb 201830min

How does gravity bend the path of light? Does it seriously act like a lens or is that just a metaphor? What does it take, and how do we know? What can we learn from this strange physics? I discuss the...

16 Jan 201834min

What strange creatures inhabit the so-called "particle zoo"? Why is it a zoo instead of something simpler? Is there anything that connects the forces and particles of our universe? I discuss these qu...

2 Jan 201832min

How does degeneracy pressure work? What kinds of particles exist below the level of neutrons? Can they hold up a star against gravity? I discuss these questions and more in today's Ask a Spaceman! Su...

19 Dec 201739min

Join me for an all new AstroTour adventure, one that I'm personally very excited about: a trip to the Atacama Desert of Chile to spend a week at an all-inclusive stargazing resort! The trip is perfect...

8 Dec 20179min

What powers a quasar? Just how strong is a blazar? What's the connection to giant black holes? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patreon.com/p...

5 Dec 201729min