What are those lasers shooting out from telescopes? Can we build a space elevator? Could we grow plants in Mars regolith? Why not assemble telescopes in space? Answering all these questions and more in this week's Overtime Q&A. 🦄 Support us on Patreon: https://patreon.com/universetoday 📚 Suggest books in the book club: https://www.goodreads.com/group/show/1198440-universe-today-book-club 00:00 Start 00:50 Could we plant in Mars regolith? 02:35 What is the bright laser coming out of telescopes? 06:08 Will telescopes be assembled in space? 07:59 Would we have our money's worth if JWST broke? 08:45 Any updates on space elevators? 12:52 Will Breakthrough Starshot happen soon? 15:24 What about a low-mass black hole? 16:37 Could Gemini North and South do optical interferometry? 19:06 Thoughts on Europa? 21:46 How do galaxies collide if the Universe is expanding 22:45 Could an LCD screen be a coronagraph? 26:46 How does light travel farther than 13.8 billion light-years? 28:19 Are we looking for machine civilizations? 📺 VIDEO VERSION https://youtu.be/CB5JBkDqmu0 📰 EMAIL NEWSLETTER Read by 60,000 people every Friday. Written by Fraser. No ads. Subscribe. It's FREE: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Astronomy Cast: http://www.astronomycast.com/ 🤳 OTHER SOCIAL MEDIA Twitter: https://twitter.com/fcain Twitter: https://twitter.com/universetoday Facebook: https://facebook.com/universetoday Instagram: https://instagram.com/universetoday 📩 CONTACT FRASER [email protected] ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0) Support Universe Today Podcast