AaS! 106: How Do We Measure the Expansion of the Universe?

Part 2! How did Einstein develop General Relativity? What does it mean for different kinds of masses to be equivalent? How does gravity do what it does? Why is curvature so important in understanding ...

17 Apr 201834min

Part 1! How did Einstein develop General Relativity? What does it mean for different kinds of masses to be equivalent? How does gravity do what it does? Why is curvature so important in understanding ...

3 Apr 201838min

Where did all the monopoles go? Do other planets have auroras? Can binary stars host planets? I discuss these questions and more in today's Ask a Spaceman! A very special edition recorded in Vik, Icel...

20 Mar 201831min

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 Mar 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