Curiosity lands on Mars

This photo provided by NASA's Jet Propulsion Laboratory shows the gravel on the surface of Mars' Gale Crater where the Curiosity rover landed late Sunday, Aug. 5, 2012. On the horizon is the rim of the crater. Part of the spring that released the lens' dust cover can be seen at the bottom right, near the rover's wheel. At top left is part of the rover's power supply. The lines across the top are an artifact from the sensor since the camera is looking into the sun. (AP Photo/NASA/JPL-Caltech)

Mars Science Laboratory Curiosity Richard Cook, MSL deputy project manager, left, and Adam Steltzner, MSL entry, descent and landing (EDL) lead, right, point to the first image taken by NASA's Curiosity rover, which landed on Mars the evening of Aug. 5 on the surface of Mars, during a news conference at NASA's Jet Propulsion Laboratory in Pasadena, Calif., Sunday, August 5, 2012. (AP Photo/Damian Dovarganes)

Mars Science Laboratory Curiosity team member Miguel San Martin, Chief Engineer, Guidance, Navigation, and Control at Jet Propulsion Laboratory, left, celebrates with Adam Steltzner, MSL entry, descent and landing (EDL) of the Mars Science Laboratory (MSL), right, after the successful landing of Curiosity rover on the surface of Mars at NASA's Jet Propulsion Laboratory in Pasadena, Calif., Sunday, Aug. 5, 2012. (AP Photo/Damian Dovarganes)

Mars Science Laboratory Curiosity members from left: Richard Cook, MSL deputy project manager, Adam Steltzner, MSL entry, descent and landing (EDL) lead and John Grotzinger, MSL project scientist, California Institute of Technology, from the Mars Science Laboratory (MSL) Curiosity Rover mission team celebrate the landing of Curiosity rover on the surface of Mars at NASA's Jet Propulsion Laboratory in Pasadena, Calif., Sunday, Aug. 5, 2012. (AP Photo/Damian Dovarganes)

Facundo Lucci, 22, of Philadelphia, center, watches a live stream of the Mars Curiosity landing along with hundreds of other spectators in Times Square, August 6, 2012, in New York. After traveling 8 1/2 months and 352 million miles, Curiosity landed on Mars Sunday night. (AP Photo/John Minchillo)

Steve Collins waits during the "Seven Minutes of Terror" as the rover approaches the surface of mars, inside the Spaceflight Operations Facility for NASA's Mars Science Laboratory Curiosity rover at Jet Propulsion Laboratory in Pasadena, California, Sunday, Aug. 5, 2012. The Curiosity robot is equipped with a nuclear-powered lab capable of vaporizing rocks and ingesting soil, measuring habitability, and potentially paving the way for human exploration. (AP Photo/Brian van der Brug, Pool)

Pete Theisinger adjusts his headset inside the Spaceflight Operations Facility for NASA's Mars Science Laboratory Curiosity rover at Jet Propulsion Laboratory in Pasadena, Calif., Sunday Aug. 5, 2012. The Curiosity robot is equipped with a nuclear-powered lab capable of vaporizing rocks and ingesting soil, measuring habitability, and potentially paving the way for human exploration. (AP Photo/Brian van der Brug, Pool)

NASA Administrator Charles Bolden closes his eyes as the rover begins its decent to the surface of mars, inside the Spaceflight Operations Facility for NASA's Mars Science Laboratory Curiosity rover at Jet Propulsion Laboratory in Pasadena, Calif., Sunday, Aug. 5, 2012. The Curiosity robot is equipped with a nuclear-powered lab capable of vaporizing rocks and ingesting soil, measuring habitability, and potentially paving the way for human exploration. (AP Photo/Brian van der Brug, Pool)

This 2003 image made available by NASA shows Mars photographed by the Hubble Space Telescope on the planet's closest approach to Earth in 60,000 years. NASAís robotic rover Curiosity landed safely on Mars late Sunday, Aug. 5, 2012 to begin two years of exploration. The mission cost $2.5 billion. (AP Photo/NASA)