★ NASA - Returning to the Moon

The Constellation Program was a human spaceflight program developed within NASA, the space agency of the United States, from 2005 to 2009. The milestone goals of the program were “completion of the International Space Station“ and a “return to the moon no later than 2020“ with the planet Mars as the ultimate goal. The Largest Stars in the Universe | Infographic Animation ► Top 10 - Best of HUBBLE ► The program’s logo