For years, the space shuttle program has taken astronauts out of Earth's orbit, allowing humans to explore space and learn more about the universe around us. The space shuttle program is one of the most important steps in the history of our quest to explore the universe. Learn the amazing triumphs and tragedies of the space shuttle program. Find out about the history of space exploration, from the earliest missions to the space shuttle's retirement. Discover how scientists hope to travel to space in years to come.