Where does the quantum world begin? Why do we have a hard time fundamentally understanding quantum systems? What connects quantum and classical physics?
Sep 17th: Why can’t I quantum tunnel myself?
Tag: Ask A Spaceman
Sep 3rd: What’s it like to fall into a black hole? (redux)
What’s it like to fall into a black hole (again)? What does the outside universe look like?
Aug 20th: Is the universe really predictable?
What is chaos theory? How can something be both deterministic and unpredictable?
Aug 6th: What are the mysterious cosmic strings?
How do cracks appear in spacetime? What does it have to do with symmetry?
Jul 16th: What do we learn from eclipses?
Why is it so hard to predict solar eclipses? How did Newton and Halley team up to solve it? What have we learned from solar eclipses since then?
Jul 2nd: Is Interstellar Travel Possible?
How hard is interstellar travel? What are the possible ways to achieve the required energy?
Jun 18th: How Do We Measure The Expansion Of The Universe?
What’s the deal with redshift? How can we actually interpret velocities when it comes to cosmic expansion?
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?