How do black holes get close enough to merge? What causes them to emit gravitational waves, and where do the waves come from?
Nov 19th: How Exactly Do Black Holes Merge?
Ask A Spaceman Archive
Nov 5th: Is it Time to Redefine the Planet?
How did Pluto get demoted? What makes a planet a planet anyway? Why do we now have so many different kinds of planets, and should we make things simpler?
Oct 15th: How Could We Turn the Sun into a Telescope?
How do gravitational lenses work? Where would a spacecraft need to be to use the Sun’s gravity as a telescope? What could we learn about exoplanets with this on weird trick?
Oct 1st: Why Do We Care About Methane on Mars?
Sep 17th: Is Space Tourism a Good Idea?
Why are private space companies pushing tourism? Is there a future for tourism in space? Is this an overall good thing for space exploration, or just a distraction?
Sep 3rd: What Made the Local Bubble?
Where do we live within the galaxy? What shapes the local bubble? How long will we be inside it?
Aug 20th: Is the Universe Making Any New Galaxies?
Aug 6th: Is the James Webb Breaking Cosmology?
Jul 16th: Can a Galaxy Be Destroyed?
Can galaxies ever get destroyed? What happens to their stars? Do galaxies ever die? More on today’s Ask a Spaceman!
Jul 2nd: Where is the Center of the Universe?
What does it mean for the Universe to have a center? Could we ever travel to ours? What is a singularity?