5459831
9781590785317
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The discovery of the 10th world, Eris, in 2005 rekindled the old dispute about Pluto. Eris is bigger than Pluto. If Pluto is a planet, then why isn't Eris one, too? Crosswell informs readers about the discovery of Eris and the long-running argument about what makes a planet.Croswell, Ken is the author of 'Ten Worlds Everything That Orbits the Sun', published 2007 under ISBN 9781590785317 and ISBN 1590785312.
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