Stars and Galaxies: Our Universe

ISBN-10
1616186623
ISBN-13
9781616186623
Series
Stars and Galaxies
Category
Science
Pages
24
Language
English
Published
2008-06-01
Author
Glen Phelan

Description

The sun and other stars shine because atoms in the star combine and release energy. Scientists measure the distances to stars in light-years. Stars are the only objects in space that make their own light. Stars differ in size, color, and brightness. A galaxy is a group of stars held together by gravity.

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