When is a planet not a planet? : the story of Pluto

题名:

PERSONAL_AUTHOR_EPSB:

摘要:

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.

出版日期范围:

2007

物理描述:

43 p. : ill. (some col.) ; 26 cm.

内容:

Introduction --The wanderers -- Some early astronomers -- Ideas that work--and those that don't -- Pluto's problems -- Finding planets -- What is a planet?

本地注释:

This book donated to our library on behalf of Howie Long our dedicated D.A.R.E. Officer, 2010-2011.

EPSB_521_1:

Gr. 2-5

EPSB_521_2:

1-4

程序信息:

Accelerated Reader LG 6.6 1.0 116718

Sky Science Gr. 6+

Science - Grade 9

Science

主题词汇: