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Sedna: The Story Of The Transneptunian Object Who Was A Planet For A Day

Sedna is not that big a deal. From the point of view of physical characteristics, it is just one of many transneptunian objects discovered in the past years. Not the smallest, but not the largest either. Over time, its diameter, estimated after the discovery at an optimistic 1800 km, has dropped to half that, and today it is believed to be similar in size to Ceres, the queen of the main asteroid belt. And so, one would be forgiven for wondering-why deal with it, beyond the bare minimum of information owed to any celestial object? As we are about to see, the reasons are there, but we want to leave the final judgment to you! - "If You happen to see any content that is yours, and we didn't give credit in the right manner please let us know at [email protected] and we will correct it immediately" "Some of our visual content is under an Attribution-ShareAlike license. (https://creativecommons.org/licenses/) in its different versions such as 1.0, 2.0, 3,0, and 4.0 – permitting commercial sharing with attribution given in each picture accordingly in the video." Credits: Ron Miller, Mark A. Garlick / MarkGarlick.com Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/ESA/ESO/ Flickr Video Chapters: 00:00 Intro 00:52 The history of Sedna 6:20 Sedna planet for a day 8:40 Sedna size #insanecuriosity #sedna #sednafactsandhistory