Stephen Wolfram Q&A, For Kids (and others) [June 25, 2021]

Stephen Wolfram answers general questions from his viewers about science and technology as part of an unscripted livestream series, also available on YouTube here: https://wolfr.am/youtube-sw-qa Questions include: What do you think about civilization going to Mars? - Why do the planets orbit in the same plane? - Are Phobos and Diemos also on the same plane? Considering they're asteroids that were grabbed by Mars and now orbit Mars - What makes a planet a planet? -  Why do most planets, stars and galaxies seem to spin the same way? - What did NASA do to avoid astronauts getting great amounts of cosmic rays? - How exactly do you detect Muons? I'm going to be taking a class next year that has a big fun project at the end of the semester that includes potentially making something that detects Muons - Why is water a good radiation shield if it has low atomic numbers inside? - Why does an iron core result in a super nova? - How do nuclear blasts affect computers?