Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.2
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
7428
Points per Word
0.000135
Page Count
64
Points per Page
0.015625
Series
Explore the Solar System
Description
This introduction to the history of telescopes and space probes includes information about their features and use.