Reading Metrics
Grade Level
Upper Grades (UG 9-12)
Book Level
7.9
Points
15.0
Fiction/Nonfiction
Nonfiction
Word Count
81813
Points per Word
0.000183
Page Count
271
Points per Page
0.055351
Description
Astronomer Mike Brown describes how his search for a tenth planet, Eris, a planet more massive than Pluto, led to the demotion of Pluto to a dwarf planet.