[Q&A] Shape of Craters, Max Size for a Telescope, Atmospheres of Black Holes

Why are most craters circular, no matter which angle the meteor falls? Is there a size limit for a telescope before diminishing returns take place? Can black holes have atmospheres? Answering all these questions and more in this Q&A show. 👉 Watch the extended Overtime Q&A: https://www.patreon.com/universetoday 00:00 Start 00:24 How big can a telescope get? 05:12 Does an optical telescope on the Moon make any sense? 08:13 Can black holes have atmospheres? 11:05 Why are craters circular not elliptical? 12:41 Will Starship refuel in orbit in 2025? 12:52 Is there evidence for primordial black holes? 📺 VIDEO VERSION https://youtu.be/MaKWptXAxC8 📰 GUIDE TO SPACE Newsletter No ads. Subscribe for FREE: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Astronomy Cast: http://www.astronomycast.com/ 📩 CONTACT FRASER frasercain@gmail.com ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0) Support Universe Today Podcast