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Author
Publisher
Clarion Books
Pub. Date
2007
Accelerated Reader
IL: LG - BL: 6.6 - AR Pts: 1
Physical Desc
43 p. : ill. (some col.) ; 26 cm.
Language
English
Description
On August 24, 2006, a group of astronomers made a big announcement: Pluto could no longer be considered a planet. This book explains how advancements in technology have changed our understanding of the universe--and exactly how and why the number of planets in our solar system went from nine to eight.
