NASA ready for November launch of car-sized Mars rover
The 1-ton rover will examine Gale Crater during a nearly two-year mission.
November 14, 2011
NASA’s most advanced mobile robotic laboratory, which will examine one of the most intriguing areas on Mars, is in final preparations for a launch from Florida’s Space Coast at 10:25 a.m. EST November 25.
This computer-generated view depicts part of Mars at the boundary between darkness and daylight, with an area including Gale Crater beginning to catch morning light. Credit: NASA/JPL-Caltech
The Mars Science Laboratory (MSL) mission will carry Curiosity, a rover with more scientific capability than any ever sent to another planet. The rover is now sitting atop an Atlas V rocket awaiting liftoff from Cape Canaveral Air Force Station.
“Preparations are on track for launching at our first opportunity,” said Pete Theisinger from NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. “If weather or other factors prevent launching then, we have more opportunities through December 18.”
Scheduled to land on the Red Planet in August 2012, the 1-ton rover will examine Gale Crater during a nearly two-year prime mission. Curiosity will land near the base of a layered mountain 3 miles (5 kilometers) high inside the crater. The rover will investigate whether environmental conditions ever have been favorable for development of microbial life and preserved evidence of those conditions.
“Gale gives us a superb opportunity to test multiple potentially habitable environments and the context to understand a long record of early environmental evolution of the planet,” said John Grotzinger, project scientist for MSL at the California Institute of Technology in Pasadena. “The portion of the crater where Curiosity will land has an alluvial fan likely formed by water-carried sediments. Layers at the base of the mountain contain clays and sulfates, both known to form in water.”
Curiosity is twice as long and five times as heavy as earlier Mars rovers Spirit and Opportunity. The rover will carry a set of 10 science instruments weighing 15 times as much as its predecessors’ science payloads.
A mast extending to 7 feet (2.1 meters) above ground provides height for cameras and a laser-firing instrument to study targets from a distance. Instruments on a 7-foot-long (2.1m) arm will study targets up close. Analytical instruments inside the rover will determine the composition of rock and soil samples acquired with the arm’s powdering drill and scoop. Other instruments will characterize the environment, including the weather and natural radiation that will affect future human missions.
“Mars Science Laboratory builds upon the improved understanding about Mars gained from current and recent missions,” said Doug McCuistion from NASA Headquarters in Washington, D.C. “This mission advances technologies and science that will move us toward missions to return samples from and eventually send humans to Mars.”
The mission is challenging and risky. Because Curiosity is too heavy to use an air-bag-cushioned touchdown, the mission will use a new landing method with a rocket-powered descent stage lowering the rover on a tether like a kind of sky-crane.
The mission will pioneer these precision landing methods during the spacecraft’s crucial dive through Mars’ atmosphere next August to place the rover onto a smaller landing target than any previously for a Mars mission. The target inside Gale Crater is 12 miles (20km) by 16 miles (25km). Rough terrain just outside that area would have disqualified the landing site without the improved precision.
No mission to Mars since the Viking landers in the 1970s has sought a direct answer to the question of whether life has existed on Mars. Curiosity is not designed to answer that question by itself, but its investigations for evidence about prerequisites for life will steer potential future missions toward answers.