Satellites are important parts of space exploration as well as everyday life on Earth. They’re used for telephone communications, military strategy, weather observation, and many other purposes. Readers learn about the many uses we have for satellites and how those have changed since the first satellites were launched. Through informative text and helpful fact boxes, readers also explore the history and importance of both the Hubble Space Telescope and the Kepler Space Observatory. Detailed photographs allow readers to see a variety of satellites up close to learn even more about these helpful space objects.