Ask a Spaceman!

What are the many sources of light in the universe? Why is a spectrum so important? What's the difference between synchrotron and Cherenkov radiation? What's the best word ever in physics? I discuss t...

2 Okt 201826min

Today I'm reading a sample from my new book, Your Place in the Universe! I'm also sharing details about how you can a) buy the book, b) contribute to my Patreon to get an autographed copy, c) get my b...

25 Sep 201823min

What does the Drake Equation teach us about extraterrestrial civilizations? What does it NOT teach us? What complexities does it hide? Is it even science? I discuss these questions and more in today's...

18 Sep 201833min

What's the connection between motion and magnetism? How can something like a black hole have a magnetic field? What's the connection to quantum mechanics? How did Einstein use magnetism to develop spe...

4 Sep 201831min

Part 2! What was going in the very early universe? How does inflation provide the seeds of larger structures? How can we possibly test this? I discuss these questions and more in today's Ask a Spacema...

21 Aug 201833min

Part 1! What are some weaknesses with the standard Big Bang model? What are the horizon and flatness problems? How does accelerated expansion solve these? I discuss these questions and more in today's...

7 Aug 201834min

What is the cosmological constant? How is the expansion of the universe related to quantum fields? How does a vacuum energy produce accelerated expansion? I discuss these questions and more in today's...

17 Juli 201843min

What is a quantum state? How can two particles share the same state? What is entanglement, and does it really allow for faster-than-light communication? I discuss these questions and more in today's A...

3 Juli 201832min