Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.9
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
11387
Points per Word
0.000176
Page Count
32
Points per Page
0.0625
Series
History News
Description
This lively, informative volume takes a close look at astronomy and space, from the early theories of Ptolemy to the Pathfinder’s voyage to Mars.