"Earth is located in the Milky Way with the perfect conditions for life to thrive. It is one of many galaxies in the vast universe. In fact, scientists are still unsure how large the universe really is--some say it never ends. But with a universe so massive, who knows what else might be living out there?"-- Provided by publisher.
Audience
Grades 4 to 6
Note
Includes index.
Contents
Our place in space -- What's a galaxy? -- Our galaxy -- How we know -- The big picture.
