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Sedna (minor-planet designation: 90377 Sedna) is a dwarf planet in the outermost reaches of the Solar System, orbiting the Sun beyond the orbit of Neptune. Discovered in 2003, the planetoid's surface is one of the reddest known among Solar System bodies.
It was discovered on November 14, 2003 by astronomers Michael Brown, Chad Trujillo, and David Rabinowitz. Sedna is currently 88 Astronomical units (AU) from the Sun, which is three times the distance between Neptune and the Sun. Sedna's orbit is an ellipse and its aphelion is estimated to be 937 AU.
The first sentence of the article states directly "Sedna (minor-planet designation 90377 Sedna) is a dwarf planet " but the classification section states that the official classification body considers it to be a "scattered object", but also says that some consider it a new class of object, and that it is also expected to meet the requirements ...
Editor’s note: A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here. Sending a spacecraft to a near-Earth asteroid ...
Image credits: yourbrainonvape #2 "Students are prohibited from organizing, advertising, playing, observing, or otherwise engaging in any form of rummy, blackjack, Texas Hold 'Em, 5/7 card stud ...
Year discovered (precovered) 90377: Sedna: 995 ± 80 76.06 506 937 85.1 ... Please help update this article to reflect recent events or newly available information.
An American student analysing publicly available data found a sprawling Mayan city with thousands of undiscovered structures, including pyramids, under a Mexican forest.. The data came from laser ...
Astronomer Mike Brown, who co-discovered Sedna in 2003, believes it to be the most scientifically important trans-Neptunian object found to date, as understanding its peculiar orbit is likely to yield valuable information about the origin and early evolution of the Solar System.