Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.2
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
12704
Points per Word
0.000157
Page Count
80
Points per Page
0.025
Series
Smithsonian (Viking)
Description
This book explores seven extraordinary celestial wonders, from our close neighbor Mars to mysterious Planet 9.