From the first time a person looked up at the sky and wondered 'What's out there?" humans have dreamed about exploring the cosmos.About 60 years ago, the first manned spacecraft left Earth's atmosphere for the first time. In the years since, astronauts have visited the moon several times--and have spent extended time living in outer space. We even have plans to send humans to Mars by the 2030s! Share in the joy of exploration and discovery with Human Missions to Outer Space.ABOUT THE SERIES: This book is part of A True Book series, Space Exploration, that includes the titles Human Missions to Outer Space, Mars Rovers, The International Space Station and UFO's. The series features the latest NASA imagery and lively text to bring the wonder of space exploarion directly to readers.