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 University https://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 Telescopes 09:22 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=2 RSS: https://www.universetoday.com/audio 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 https://www.patreon.com/universetoday More stories at https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: https://twitter.com/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] Universe Today Podcast