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?
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
AaS! 252: Why Can't We Get Free Energy from the Vacuum?
Why does the vacuum of spacetime have energy? How much energy does it have? What prevents us from using it to do anything useful? I discuss these questions and more in today's Ask a Spaceman! Support ...
22 Juli 202534min
AaS! 251: Are the Cosmic Voids Really Empty?
How do we actually define voids? Are there regions within them that are truly empty? What would it be like to be inside one? I discuss these questions and more in today's Ask a Spaceman! Support the s...
8 Juli 202530min
AaS! 250: Where Do the Constants of Nature Come From? Part 2
Part 2 of 2! What are the modern constants of nature? Is the universe fine-tuned for life? Does the multiverse or string theory explain the origins of the constants? I discuss these questions and more...
17 Juni 202533min
AaS! 249: Where Do the Constants of Nature Come From? Part 1
Part 1 of 2! How do fundamental constants appear in physics? Why are they so important? Why do we care where they come from? I discuss these questions and more in today's Ask a Spaceman! Support the s...
3 Juni 202536min
AaS! 248: What's Going on Inside Neutron Stars?
What's inside a neutron star? What strange states of matter do we encounter? And what mysteries will we find deep in the core? I discuss these questions and more in today's Ask a Spaceman! Support the...
20 Maj 202532min
AaS! 247: How Can We Get Giant Black Holes in the Early Universe?
How do we explain the giant black holes appearing in the young universe? Is it possible to directly collapse a black hole, skipping the formation of stars? What does ultraviolet radiation have to do w...
6 Maj 202528min
