Sept. 10, 2019
Welcome back to Season 2 of my weekly live QA. Your chance to ask me your questions about space and astronomy... live. Sometimes I'll have guests, and sometimes I won't. This week... I didn't. You wanted to know about recent news about astronauts mixing concrete in space, the formation of craters on Titan, and what might be the difficulties of people going to the Moon or Mars? 04:22 Mixing concrete on ISS? 07:44 Could you make shotcrete from regolith? 09:50 Why do some planets spin backwards? 12:22 Formation of Titan's lakes 14:02 Why don't millionaires and billionaires live on the Moon? 18:40 Will SpaceX make electric rockets? 21:21 What if Mars crashed into Jupiter? 23:12 Why are LISA and LIGO only 2-dimensional? 26:13 Could we survive without a pressure suit? 27:24 How is the Planet 9 search going? 28:25 Why hasn't Tim Dodd finished his new video? 29:19 Does gravity move in a different speed through different media? 30:46 Any difficulties in crewed missions to the Moon or Mars? 33:35 What is my opinion on the Great Filter? 34:26 How do we know how old the Universe is? 36:34 How do we avoid space madness? 38:29 Does quantum enganglement allow instant communication? 41:30 When will we prove dark matter exists? 45:39 Is it possible that dark matter is antimatter? 46:30 When will we visit Neptune again? 47:10 Does the Fermi Paradox make me less scared about AI? 48:12 Any protocols for alien contact? 49:23 Plans to send an asteroid hunter to L3 50:23 What's the deal with Saturn's rotation? 51:24 Why are we hearing about NEOs? 55:10 Do they do autopsies on astronauts? 56:34 Upcoming shows and projects Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - [email protected]
