Discovering New Planets (A True Book: Dr. Mae Jemison and 100 Year Starship) (A True Book (Relaunch))

Astronomers have been working for decades to locate and identify all of the planets they can.There are eight planets in our solar system, and there could be billions more throughout space. Readers (Grades 3-5) will discover what methods these scientists use, how new technology has helped them see further than ever, and why some scientists think that faraway planets could be home to life forms unlike anything on Earth.