Episode 661: Q&A 121: What Stops the Space Station from Re-Entry? And More... Featuring Michael Rodruck

In this week's questions show, I answer questions about how the International Space Station stays above the Earth's atmosphere, does dark matter need a better name? And how do astronomers know they're looking at exoplanets and not sunspots?Michael Rodruck with Pennsylvania State Universityhttps://sites.psu.edu/mrodruck/00:18 How does the ISS stay up?01:54 Does dark matter need a better name?04:12 Could planets orbit something that isn't a star?07:00 GOTO Telescopes09:22 How do we know it's exoplanets and not sunspots?11:55 Interstellar travel without wormholes?14:23 Why make Mars habitable?16:38 Have we mapped Venus?18:23 What would it feel like to stand on a massive disk?20:25 Can dark matter get concentrated into a black hole?22:30 Are there even closer black holes?24:21 How do we know how many stars in the Milky Way?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://podcasts.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2RSS: https://www.universetoday.com/audioWeekly email newsletter:https://www.universetoday.com/newsletterWeekly Space Hangout:https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/Astronomy Cast:https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSgSupport us at https://www.patreon.com/universetodayMore stories at https://www.universetoday.com/Twitch: https://twitch.tv/fcainFollow us on Twitter: https://twitter.com/universetodayLike us on Facebook: https://www.facebook.com/universetodayInstagram - https://instagram.com/universetodayTeam: Fraser Cain - @fcain / [email protected] Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fwChad Weber - [email protected] Universe Today Podcast