[Q&A] Showstopper for Mars Missions, Vera Rubin vs Aliens, Space Whales

Which is a bigger showstopper for a human Mars mission: food or radiation exposure? Does Vera Rubin leave any chance for aliens to still sneak upon us? Can something like space whales actually exist? And in Q&A+, when can we find out what dark matter and dark energy actually are? 🦄 Support us on Patreon: https://patreon.com/universetoday00:00 Start00:31 [Kasie Ream] Which is the bigger showstopper for Mars: food or radiation?02:29 [Richard Vanasse] Does Vera Rubin make it impossible for an alien fleet to sneak up on Earth?02:54 [ventsyv] One question to ask aliens03:24 [Terminally Offline] How can I get into a career in a planetarium? 05:56 [Steve Kennedy] What is the difference between a Kilonova and a Type 1a Supernova?06:12 [teknophyle] Should we quickly become a two planet species? 08:14 [Michael D] How do I feel about the possibility of "space whales" type aliens?09:51 [Bobby 2112] How does artificial gravity work on various scifi spaceships?12:34 [shootZ234] Interesting facts about black holes12:55 [paul wilson] How bright will the Betelgeuse explosion be? 📺 VIDEO VERSIONhttps://youtu.be/MxowG6xhdX4📰 GUIDE TO SPACE Newsletter No ads. Subscribe for FREE: https://universetoday.com/newsletter🎧 PODCASTSUniverse Today: https://universetoday.fireside.fm/Astronomy Cast: http://www.astronomycast.com/📩 CONTACT [email protected]⚖️ LICENSECreative Commons Attribution 4.0 International (CC BY 4.0)Support Universe Today Podcast