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Sedna losing support for "planet" status
The most recently-discoverd member of the solar system is not only going to find it difficult to get classified as a planet, it is likely to influence Pluto's planetary status, as well. At 1100 miles in diameter, it is less than half the size of Mercury, the next smallest planet. Pluto, at about 1400 miles in diameter, is not much bigger. Many astronomers have been trying to get Pluto de-listed as a planet for years based on its size and irregular orbit. Now that Sedna is in the picture, their fates will likely be set together. Sedna has little support of being classified as a planet and if it doesn't make it, it will be hard for Pluto to retain its planetary status.
We will all have to leave off the last letter of whatever acronym we learned to remember the planets. It seems like there should be some statute of limitations on recending membership in the "Planet club." Pluto was discovered in 1930.
Sedna is the Inuit goddess of the ocean; she is up there in orbit with some other famous bodies circling the Sun: Beethoven, Shakespeare, Martin Luther, Lennon, Pele, Mr. Spock, and smaller asteroids Clapton, Tomjones, Jamesbond, Einstein, and all four Beatles. Stellar company.
Posted by Dan Brooks on March 16, 2004 at 02:35 PM | Permalink






