[Q&A] Dark Matter Evidence, Oort Cloud Shape, Size of Lagrange Points

Will LIGO detect gravitational waves when Betelgeuse explodes? Why are scientists so sure about dark matter? Could Betelgeuse become a black hole after it goes supernova? Why is the Oort cloud a sphere, not a disk? What determines the size of Lagrange points? All this and more in this week's Q&A! 🦄 Support us on Patreon: https://patreon.com/universetoday 📚 Suggest books in the book club: https://www.goodreads.com/group/show/1198440-universe-today-book-club 00:00 Start 00:49 [Tatooine] Why is the Oort cloud a sphere? 06:25 [Coruscant] Could field stars have no metals? 11:00 [Hoth] Will Betelgeuse become a black hole? 12:32 [Naboo] Why the Universe didn't become a black hole? 14:45 [Kamino] Why are scientists so sure about dark matter? 20:56 [Bespin] Will LIGO detect Betelgeuse's bang? 25:02 [Mustafar] Will Earth's polarity flip break all compasses? 26:21 [Alderaan] How big are Lagrange points? 28:45 [Dagobah] What science discovery do I anticipate the most? 29:57 [Yavin] Can we safely go through heliospheric termination shock? 32:03 [Mandalore] How big must the accretion disk be for Sgr A to be visible from Earth? 📺 VIDEO VERSION https://youtu.be/NvQOatYAmIw 📰 EMAIL NEWSLETTER Read by 60,000 people every Friday. Written by Fraser. No ads. Subscribe. It's FREE: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Astronomy Cast: http://www.astronomycast.com/ 🤳 OTHER SOCIAL MEDIA Twitter: https://twitter.com/fcain Twitter: https://twitter.com/universetoday Facebook: https://facebook.com/universetoday Instagram: https://instagram.com/universetoday 📩 CONTACT FRASER frasercain@gmail.com ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0)