How Many Planets There Actually Are

Originally posted to the Astro Pro Channel on October 18, 2022 Buy the map here: https://store.nebula.tv/products/atlas-pro-mars-surface-art-print Everyone remembers the day Pluto was downgraded from a planet to a "dwarf planet." But what was the real motive behind this decision, and what else might the IAU been trying to hide? Sources / Further Reading: https://www.iau.org/news/pressreleases/archive/year/2006/ https://www.iau.org/news/pressreleases/detail/iau0603/ https://www.sandiegouniontribune.com/news/150-years/sd-me-150-years-august-25-htmlstory.html https://archive.org/details/galileoatwork00stil http://mitchellarchives.com/the-discovery-of-pluto.htm https://www.google.com/books/edition/How_I_Killed_Pluto_and_Why_It_Had_It_Com/ywJD6s64ErgC?hl=en&gbpv=1&dq=memoir+on+a+trans+neptunian+object&printsec=frontcover https://web.albion.edu/images/sites/news/USA_Today_NASA14_p51-53.pdf https://www.esa.int/About_Us/ESA_history/Asteroids_The_discovery_of_asteroids https://www.thehindu.com/children/pallas-the-second-asteroid-to-be-discovered/article65236776.ece https://spaceweather.com/swpod2006/13sep06/Pollock1.jpg http://philsci-archive.pitt.edu/3418/ http://web.gps.caltech.edu/~mbrown/planetlila/ http://web.gps.caltech.edu/~mbrown/papers/ps/xena.pdf http://authors.library.caltech.edu/34486/1/1538-4357_632_1_L45.pdf https://en.wikipedia.org/wiki/50000_Quaoar#/media/File:Quaoar_discovery_animation.gif https://arxiv.org/abs/1604.07461 https://iopscience.iop.org/article/10.3847/2041-8205/825/1/L9 https://solarsystem.nasa.gov/resources/492/oort-cloud-and-scale-of-the-solar-system-infographic/ https://www.iau.org/public/themes/naming/ https://www.skyatnightmagazine.com/space-science/asteroid-vesta-discovery-celestial-police/ https://www.iau.org/news/pressreleases/detail/iau0804/ https://www.loc.gov/everyday-mysteries/astronomy/item/why-is-pluto-no-longer-a-planet/ https://www.loc.gov/item/webcast-7161/ https://had.aas.org/resources/aashistory/early-meetings/1927-1932 https://www.iau.org/public/themes/naming/ https://www.wsj.com/articles/SB10001424052748703818204576206993599401986 https://www.nasa.gov/mission_pages/voyager/multimedia/pia17046.html https://www.dlr.de/content/en/images/2015/3/a-tiny-moving-point-of-light-the-discovery-of-pluto_19942.html A tiny, moving point of light – the discovery of Pluto - DLR Portalhttps://onlineonly.christies.com/s/eureka-scientific-breakthroughs-20th-century/planet-beyond-neptune-7/90141 https://www.atticusrarebooks.com/pages/books/1367/percival-lowell/memoir-on-a-trans-neptunian-planet-memoirs-of-the-lowell-observatory-volume-1-no-1-1915-offprint https://www.rarenewspapers.com/view/559832?imagelist=1 https://www.rarenewspapers.com/view/588339 https://www.rarenewspapers.com/view/559832?imagelist=1 https://www.flickr.com/photos/bowbrick/215869619 https://www.nasa.gov/newhorizons/happy-birthday-clyde-tombaugh-nh-returns-new-images-of-pluto https://www.loc.gov/resource/hhh.az0374.photos/?sp=3 https://solarsystem.nasa.gov/planets/dwarf-planets/makemake/in-depth/ https://www.newyorker.com/magazine/2006/07/24/the-tenth-planet http://www.johnstonsarchive.net/astro/planet10.html https://tulsaworld.com/archive/science-mini-planet-found-near-pluto/article_7d0949bf-8920-55d0-a456-66ee5864baa8.html https://www.space.com/25817-quaoar.html https://astrobiology.nasa.gov/news/planets-still-forming-detected-in-a-protoplanetary-disk/#:~:text=The%20leading%20theory%20of%20planet,close%20to%20the%20protoplanet's%20stars. https://svs.gsfc.nasa.gov/12278 https://svs.gsfc.nasa.gov/vis/a010000/a010600/a010662/index.html https://www.physics.nau.edu/~trujillo/quaoar/ https://phys.org/news/2015-08-dwarf-planet-quaoar.html https://webbtelescope.org/news/first-images/gallery