What’s the deal with redshift? How can we actually interpret velocities when it comes to cosmic expansion?
Jun 18th: How Do We Measure The Expansion Of The Universe?
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Ask A Spaceman Archive
Jun 4th: Is everything a wave or a particle, and why does my head hurt?
Is light made of waves or particles? Is matter made of waves or particles? What does it mean for matter to “wave”, anyway?
May 21st: What turned Venus into hell?
What’s so bad about Venus, besides everything? How did it get so bad? How about Earth? @PaulMattSutter will answer the questions at #365DaysOfAstro
May 7th: What’s Wrong With the Cosmic Calendar?
What is the “cosmic calendar”? What are some important scales in the universe?
Apr 16th: What are the mighty clusters of galaxies?
What are galaxy clusters made of, besides galaxies? How can we use them to understand dark matter? And how can we make pretend ones on a computer?
Apr 2nd: What is the black hole information paradox?
What is “information” in physics? Why do we think it’s preserved, and what happens to information when it falls into a black hole? Why is this a problem? I discuss these questions and more in today’s Ask a Spaceman!
Mar 19th: Why Avoid the Cosmic Voids?
How do cosmic voids form? What do they teach us about dark energy? What did the early universe look like?
Mar 5th: Do we live in the multiverse?
What’s the difference between the universe and the multiverse? Do we live in the multiverse? @PaulMattSutter at #365DaysOfAstro
Feb 19th: Who’s In Charge Of The Quantum World?
How did Max Planck accidentally discover quantum mechanics? Why is his constant so special? #AskASpaceman with @PaulMattSutter
Feb 5th: What makes the strong force so strong?
Why is the strong force better known as the “color force”? What’s the best way to think about protons and quarks?