21st Century Mysteries of Deep Space. Elementary readers will get a look into space exploration as they move through this fascinating nonfiction title. Readers will discover galaxies like the Milky Way, the effect gravity has on the inner and outer planets, comets, asteroids, constellations, and what measures scientists are taking to learn more about the vast body of the universe and more, including the Hubble Telescope and the Mars Rover. With vivid images, intriguing facts, informational text, a glossary, and a list of helpful websites, readers are encouraged to discover what they would explore in deep space This