00927cam a2200229 4500 62560353 TxAuBib 20100426120000.0 061205s2007||||||||||||||||||||||||eng|u 2006100684 9780618898329 0618898328 TxAuBib Scott, Elaine. When is a planet not a planet? : the story of Pluto / by Elaine Scott. New York : Clarion Books, 2007. 43 p. : ill. (some col.) ; 26 cm. Includes bibliographical references and index. Introduction --The wanderers -- Some early astronomers -- Ideas that work--and those that don't -- Pluto's problems -- Finding planets -- What is a planet? 20100426. https://catdir.loc.gov/catdir/toc/ecip076/2006100684.html Pluto (Dwarf planet)