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Dark Matter Evidence, Oort Cloud Shape, Size of Lagrange Points | Q&A 229

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! Dark matter is not a theory    • dark matter is not a theory   🦄 Support us on Patreon:   / universetoday   📚 Suggest books in the book club:   / 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? 📰 EMAIL NEWSLETTER Read by 60,000 people every Friday. Written by Fraser. No ads. Subscribe Free: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Astronomy Cast: http://www.astronomycast.com/ 🤳 OTHER SOCIAL MEDIA Twitter:   / fcain   Twitter:   / universetoday   Facebook:   / universetoday   Instagram:   / universetoday   📩 CONTACT FRASER [email protected] ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0) You are free to use my work for any purpose you like, just mention me as the source and link back to this video.