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When Is a Planet Not a Planet?: The Story of Pluto
     

When Is a Planet Not a Planet?: The Story of Pluto

by Elaine Scott
 

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ISBN-10: 0618898328

ISBN-13: 2900618898328

Pub. Date: 08/20/2007

Publisher: Houghton Mifflin Harcourt

Q: When is a planet not a planet?

Scientists have argued for years over the answer to this question. And central to their debate has been Pluto, the tiny orb circling the Sun at the outermost reaches of our solar. Then on August 24, 2006, a group of astronomers made a big announcement: Pluto could no longer be considered a planet.

This fascinating and

Overview

Q: When is a planet not a planet?

Scientists have argued for years over the answer to this question. And central to their debate has been Pluto, the tiny orb circling the Sun at the outermost reaches of our solar. Then on August 24, 2006, a group of astronomers made a big announcement: Pluto could no longer be considered a planet.

This fascinating and breathtakingly illustrated book explains in simple terms 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.

A: When it's a dwarf planet.

Product Details

ISBN-13:
2900618898328
Publisher:
Houghton Mifflin Harcourt
Publication date:
08/20/2007
Edition description:
None
Pages:
48

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