There are thousands of satellites in space! Some of these human-made machines observe Earth, predict the weather, and help people communicate. Others take pictures of planets, stars, and mysterious black holes in our vast universe! This book takes readers on an exciting out-of-this-world voyage and uncovers cutting-edge technology while supporting STEM and NGSS standards. Each book contains fact boxes, sidebars, a glossary, an index, and places to go for more information.