Episode 548: Q&A 95: Is Techno-Optimism Blinding Us To The Challenges of Space Exploration? And More...

In this week's questions show, I answer if techno optimism is blinding us to the challenges of spaceflight, why there aren't spacecraft at all the planets right now, could the Great Attractor be dark matter? And more... Links to various raw images Cassini - https://solarsystem.nasa.gov/raw-images/raw-image-viewer/?order=earthdate+desc&perpage=50&page=0 Curiosity - https://mars.nasa.gov/msl/multimedia/raw/#/?slide=2496 Dawn - https://solarsystem.nasa.gov/missions/dawn/galleries/images/?page=0&perpage=25&order=createdat+desc&search=&tags=dawn&condition1=1%3Aisinresourcelist&category=51 00:33 Is techno-optimism blinding us to challenges of spaceflight 04:17 Why aren't there spacecraft at all the planets right now? 06:22 What if the Universe wraps? 08:39 Could the Great Attractor be dark matter? 10:21 What's the biggest telescope that could be built on the Moon? 11:50 Open your mind to crop circles 13:59 How do you steer a solar sail? 16:25 Twin planets in L3 Lagrange Points? 18:23 Shouldn't the frost line move outward? 19:59 Can a red giant support life? 22:07 What if astronauts get sick? 24:07 How does the radial velocity method detect multiple planets? Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week, and answer them here. 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 / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.com