Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.6
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
2115
Points per Word
0.000236
Page Count
32
Points per Page
0.015625
Description
This book discusses Earth as a part of the solar system, including ancient astronomers' research that changed the way Earth was understood, exploration outside Earth's atmosphere, and the possibility of sending humans to other plants.