Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.2
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
2542
Points per Word
0.000197
Description
On 23 July 1999, Commander Eileen Collins took the space shuttle 'Columbia' into orbit, to launch the Chandra X-Ray Observatory, which will help scientists to find answers to some of the riddles of the universe, such as what are black holes?