Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.2
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
6953
Points per Word
0.000144
Page Count
64
Points per Page
0.015625
Series
Explore the Solar System
Description
This introduction to human space exploration includes information about the early history of space travel and current space exploration.