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?
Feb 6th: Why should we believe the big bang?
Ask A Spaceman Archive
Jan 16th: How Does Gravity Make a Lens?
How does gravity bend the path of light? Does it seriously act like a lens or is that just a metaphor?
Jan 2nd: Who Lives in the Particle Zoo?
What strange creatures inhabit the so-called “particle zoo”? Why is it a zoo instead of something simpler?
Dec 23rd: Atacama AstroTour Special
Spend six dark nights journey to the stars, hosted by astrophysicist Paul Sutter.
Dec 19th: Are quark stars real?
How does degeneracy pressure work? What kinds of particles exist below the level of neutrons?
Dec 5th: What makes a blazar blaze so brightly?
What powers a quasar? Just how strong is a blazar?
Nov 21st: Do we live in a hologram?
What’s the idea behind the holographic principle? What does it have to do with black holes and the early universe?
Nov 7th: Why can’t I be an astrophysicist?
Why is it tough to become a scientific researcher? What are some of the barriers in the field?
Oct 17th: What is Metallic Hydrogen?
What in the world is metallic hydrogen? What does it even mean?
Oct 3rd: How does one become an astrophysicist?
How does one become an astrophysicist? What are the challenges and rewards of that kind of career?