lunes, 21 de noviembre de 2011

Space Exploration - NASA’s Curiosity Set to Search for Signs of Martian Life

Curiosity at work firing a laser on Mars
This artist's concept depicts the rover Curiosity, of NASA's Mars Science Laboratory mission, as it uses its Chemistry and Camera (ChemCam) instrument to investigate the composition of a rock surface. ChemCam fires laser pulses at a target and views the resulting spark with a telescope and spectrometers to identify chemical elements. The laser is actually in an invisible infrared wavelength, but is shown here as visible red light for purposes of illustration. Credit: NASA
Action packed landing Animation below
Nov 19 Update: MSL launch delayed 24 h to Nov. 26 – details later
In just 7 days, Earth’s most advanced robotic roving emissary will liftoff from Florida on a fantastic journey to the Red Planet and the search for extraterrestrial life will take a quantum leap forward. Scientists are thrilled that the noble endeavor of the rover Curiosity is finally at hand after seven years of painstaking work.
NASA’s Curiosity Mars Science Laboratory (MSL) rover is vastly more capable than any other roving vehicle ever sent to the surface of another celestial body. Mars is the most Earth-like planet in our Solar System and a prime target to investigate for the genesis of lifebeyond our home planet.
Curiosity is all buttoned up inside an aeroshell at a seaside launch pad atop an Atlas V rocket and final preparations are underway at the Florida Space Coast leading to a morning liftoff at 10:25 a.m. EST on Nov. 25, the day after the Thanksgiving holiday.
MSL is ready to go,” said Doug McCuistion, director of the Mars Exploration Program at NASA Headquarters in Washington, at a media briefing. “It’s a momentous occasion. We’re just thrilled that we’re at this point.”
“Curiosity is ‘Seeking the Signs of Life’, but is not a life detection mission. It is equipped with state-of-the-art science instruments.”
This oblique view of Gale Crater shows the landing site and the mound of layered rocks that NASA's Mars Science Laboratory will investigate. The landing site is in the smooth area in front of the mound. Image credit: NASA/JPL-Caltech/ASU/UA
“It’s not your father’s rover. It’s a 2000 pound machine that’s over 6 feet tall – truly a wonder of engineering,” McCuistion stated.
“Curiosity is the best of US imagination and US innovation. And we have partners fromFrance, Canada, Germany, Russia and Spain.”
“Curiosity sits squarely in the middle of our two decade long strategic plan of Mars exploration and will bridge the gap scientifically and technically from the past decade to the next decade.”
Mars Science Laboratory builds upon the improved understanding about Mars gained from current and recent missions,” said McCuistion. “This mission advances technologies and science that will move us toward missions to return samples from and eventually send humans to Mars.”
Curiosity Mars Science Laboratory Rover - inside the Cleanroom at KSC. Credit: Ken Kremer
The car sized rover is due to arrive at Mars in August 2012 and land inside Gale Crater near the base of a towering and layered Martian mountain, some 5 kilometers (3 miles) high. Gale Crater is 154 km (96 mi) in diameter.
The landing site was chosen because it offers multiple locations with different types of geologic environments that are potentially habitable and may have preserved evidence about the development of microbial life, if it ever formed.
Gale Crater is believed to contain clays and hydrated minerals that formed in liquid water eons ago and over billions of years in time. Water is an essential prerequisite for the genesis of life as we know it.
NASA's most advanced mobile robotic laboratory, the Mars Science Laboratory carrying the Curiosity rover, is set to launch atop an Atlas V rocket at 10:25 a.m. EST on Nov. 25 on a mission to examine one of the most intriguing areas on Mars at Gale crater. Credit: NASA
The one ton robot is a behemoth, measuring 3 meters (10 ft) in length and is nearly twice the size and five times as heavy as NASA’s prior set of twin rovers – Spirit and Opportunity.
Curiosity is equipped with a powerful array of 10 science instruments weighing 15 times as much as its predecessor’s science payloads. The rover can search for the ingredients of lifeincluding water and the organic molecules that we are all made of.
Curiosity will embark on a minimum two year expedition across the craters highly varied terrain, collecting and analyzing rock and soil samples in a way that’s never been done before beyond Earth.
Eventually our emissary will approach the foothills and climb the Martian mountain in search of hitherto untouched minerals and habitable environments that could potentially have supported life’s genesis.
With each science mission, NASA seeks to take a leap forward in capability and technology to vastly enhance the science return – not just to repeat past missions. MSL is no exception.
Watch a dramatic action packed animation of the landing and exploration here:
Curiosity was designed at the start to be vastly more capable than any prior surface robotic explorer, said Ashwin Vasavada, Curiosity’s Deputy Project Scientist at NASA’s Jet Propulsion Laboratory in Pasadena, Calif
“This is a Mars scientist’s dream machine.”
Therefore this mission uses new technologies to enable the landing of a heavier science payload and is inherently risky. The one ton weight is far too heavy to employ the air-bag cushioned touchdown system used for Spirit and Opportunity and will use a new landing method instead.
Curiosity will pioneer an unprecedented new precision landing technique as it dives through the Martian atmosphere named the “sky-crane”. In the final stages of touchdown, a rocket-powered descent stage will fire thusters to slow the descent and then lower the rover on a tether like a kind of sky-crane and then safely set Curiosity down onto the ground.
NASA has about three weeks to get Curiosity off the ground from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida before the planetary alignments change and the launch window to Mars closes for another 26 months.
“Preparations are on track for launching at our first opportunity,” said Pete Theisinger, MSL project manager at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, Calif. “If weather or other factors prevent launching then, we have more opportunities through Dec. 18.”
Mars Science Laboratory Briefing. Doug McCuistion, Mars program director, left, Ashwin Vasavada, MSL deputy project scientist, and Pete Theisinger, MSL project manager, share a laugh during a news briefing, Nov. 10, 2011, at NASA Headquarters in Washington. Curiosity, NASA's most advanced mobile robotic laboratory, will examine one of the most intriguing areas on Mars. The Mars Science Laboratory (MSL) mission is set for launch from Florida's Space Coast on Nov. 25 and is scheduled to land on the Red Planet in August 2012 where it will examine the Gale Crater during a nearly two-year prime mission. Credit: NASA/Paul E. Alers
Complete Coverage of Curiosity – NASA’s Next Mars Rover launching 25 Nov. 2011
Read continuing features about Curiosity by Ken Kremer starting here:
Source: Universe Today

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