Aldrin's bootprint in the lunar soil (NASA) Apollo 17 Cernan test-driving the LRV near the LM (NASA) ISS from STS-119 in Mar., 2009 (NASA) 'Calypso' Panorama of Spirit's View from 'Troy' (Stereo) (Cornell, NASA JPL) Drawing of GPS Satellite Astronauts Hieb, Akers, and Thuot During STS-49 Extravehicular Activity (EVA) (NASA) Rendering of GeoEye-1 in orbit (GeoEye) Hubble drifts over Earth after its release in 2009 by the crew of the Space Shuttle Atlantis (NASA) Jupiter's moon, lo, was taken by the Chandra X-Ray Observatory (NASA) Gil Moore holding a Mock-up of the StarShine Satellite view of Apollo 15 liftoff in 1971 (NASA) An Early CubeSat 10x10x10 cm Satellite The Delta II rocket with its Mars Exploration Rover (MER-A) payload lifts off in 2003 (NASA) The Alexis Small X-ray Satellite Testing one of the SSTL Small Satellites that Maku up the Disaster Monitoring Constellation (DMC) O'Neill Space Colony