Planet Nine: Our Solar System s Missing Planet?

Check out Squarespace: http://squarespace.com/GEOGRAPHICS for 10% off on your first purchase. → Subscribe for new videos two times per week. https://www.youtube.com/channel/UCHKRfxkMTqiiv4pF99qGKIw?sub_confirmation=1 Love content? Check out Simon s other YouTube Channels: Biographics: https://www.youtube.com/channel/UClnDI2sdehVm1zm_LmUHsjQ/ MegaProjects: https://www.youtube.com/channel/UC0woBco6Dgcxt0h8SwyyOmw SideProjects: https://www.youtube.com/channel/UC3Wn3dABlgESm8Bzn8Vamgg Casual Criminalist: https://www.youtube.com/channel/UCp1tsmksyf6TgKFMdt8-05Q Today I Found Out: https://www.youtube.com/user/TodayIFoundOut TopTenz: https://www.youtube.com/user/toptenznet Highlight History: https://www.youtube.com/channel/UCnb-VTwBHEV3gtiB9di9DZQ XPLRD: https://www.youtube.com/channel/UCVH8lH7ZLDUe_d9mZ3dlyYQ Business Blaze: https://www.youtube.com/channel/UCYY5GWf7MHFJ6DZeHreoXgw This video is #sponsored by Squarespace. Source/Further reading: BBC, why has no-one seen Planet Nine? https://www.bbc.com/future/article/20210216-the-massive-planet-scientists-cant-find  NASA, Planet 9 in-depth:https://solarsystem.nasa.gov/planets/hypothetical-planet-x/in-depth/  New Scientist, primordial black hole? https://www.newscientist.com/article/mg24933280-100-is-there-an-ancient-black-hole-at-the-edge-of-the-solar-system/  Smithsonian, Hunt for Planet Nine takes a hit: https://www.smithsonianmag.com/smart-news/new-study-knocks-ninth-planets-theoretical-existence-orbit-180977040/  Scientific American, Planet Nine could be a mirage: https://www.scientificamerican.com/article/planet-nine-could-be-a-mirage/  Search for Planet Nine blog: https://findplanetnine.blogspot.com/2021/04/the-inner-oort-cloud-connection.html  Smithsonian, history of the hunt for Planet X: https://www.smithsonianmag.com/science-nature/brief-history-hunt-planet-x-180957551/  The search for Trans-Neptunian Worlds: https://solarviews.com/eng/hypothet.htm#trans  Nat Geo, the hunt for Planet Vulcan: https://www.nationalgeographic.com/science/article/151104-newton-einstein-gravity-vulcan-planets-mercury-astronomy-theory-of-relativity-ngbooktalk  1870s NYT article on Vulcan’s existence: https://timesmachine.nytimes.com/timesmachine/1876/09/26/93907664.html?pageNumber=4 Nibiru myth: https://www.space.com/15551-nibiru.html  Britannica, discovery of Neptune: https://www.britannica.com/place/Neptune-planet/Neptunes-discovery  Geographics on Pluto: https://www.youtube.com/watch?v=g-aSGfw4BIg&t=1s  Nemesis Star: https://www.space.com/22538-nemesis-star.html  Sedna orbit and Planet Nine: https://www.astrobio.net/news-exclusive/getting-wise-about-nemesis/  Mike Brown, Alan Stern rivalry: https://www.theguardian.com/science/2016/may/01/2006-space-oddity-pluto-debate-row  Finding most-distant ever objects by looking for Planet 9: https://www.sciencealert.com/farfarout-is-definitely-the-most-distant-known-object-in-the-solar-system  Durer’s Rhino: https://www.historytoday.com/archive/natural-histories/d%C3%BCrer%E2%80%99s-enduring-rhino