Can we harvest energy from the Moon's temperature difference? Why don't we just launch multiple telescopes like Hubble? Why is the Moon grey? Why are sunspots black? Answering all these questions and more in this week's Q&A show! 🦄 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 00:27 [Andoria] Can we extract energy from Moon's temperature difference? 05:19 [Vulcan] Constellation of "Almost Hubbles" 08:40 [Risa] Why do sunspots look black? 10:26 [Aeturen] Will we still be 'alone' if we find life on Europa? 14:52 [Vendikar] Why do black holes shrink? 20:22 [Remus] What lifeforms can survive on Jovian moons? 25:01 [Janus] Why is the Moon grey? 26:44 [Cait] Why not build a very big spacecraft in orbit? 31:06 [Betazed] Will humans ever fly on solar sails? 33:09 [Cheleb] What does a lunar eclipse look like on the Moon? 35:03 [Nimbus] Will we ever see a Venus rover? 37:56 [Belos] Could Enceladus have life during the Sun's red giant phase? 📰 EMAIL NEWSLETTER Read by 70,000 people every Friday. Written by Fraser. No ads. Subscribe for FREE: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Astronomy Cast: http://www.astronomycast.com/ 🤳 OTHER SOCIAL MEDIA Mastodon: astrodon.social/@fcain Twitter: https://twitter.com/fcain Twitter: https://twitter.com/universetoday Facebook: https://facebook.com/universetoday Instagram: https://instagram.com/universetoday 📩 CONTACT FRASER frasercain@gmail.com ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0) You are free to use my work for any purpose you like, just mention me as the source and link back to this video.