NASA rover launched to see if Mars can sustain life

Journey to reach 'Red Planet' to take nearly nine months; once landed, rover to probe rock, soil for life ingredients

By REUTERS
November 26, 2011 18:29
2 minute read.
Atlas 5 rocket lifts off from the launch pad

Atlas 5 rocket lifts off from the launch pad 311 (R). (photo credit: REUTERS/Michael Brown)

 
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CAPE CANAVERAL, Fla. - An unmanned Atlas 5 rocket blasted off from Cape Canaveral Air Force Station in Florida on Saturday, launching a $2.5 billion nuclear-powered NASA rover toward Mars to look for life habitats there.

The 20-story-tall booster built by United Launch Alliance lifted off from its seaside launch pad at 10:02 a.m. EST (1502 GMT), soaring through partly cloudy skies as it headed into space to send NASA's Mars Science Laboratory on a 354-million mile (556 million km), nearly nine-month journey to the 'Red Planet.'

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"Mars Science Lab is on its way to Mars," NASA launch commentator George Diller said as the spacecraft separated from the rocket.

The car-sized rover is expected to touch down on Aug. 6, 2012, to begin two years of detailed analysis of a 96-mile (154-km) wide impact basin near the Martian equator called Gale Crater.

The mission's goal is to determine if Mars has or ever had environments to support life. It is the first astrobiology mission to Mars since the 1970s-era Viking probes.

Scientists chose the landing area because it has a three-mile (4.8-km) high mountain of what appears from orbital imagery and mineral analysis to be layers of rock piled up like the Grand Canyon, each layer testifying to a different period in Mars' history.

The rover, nicknamed Curiosity, has 17 cameras and 10 science instruments, including chemistry labs, to identify elements in soil and rock samples to be dug up by the probe's drill-tipped robotic arm.

The base of the crater's mountain has clays, evidence of a prolonged wet environment, said planetary scientist John Grotzinger of the California Institute of Technology and the mission's lead scientist.

Water is considered to be a key element for life, but not the only one. Previous Mars probes, including the rovers Spirit and Opportunity, searched for signs of past surface water.

With Curiosity, which is twice as long and three times heavier than its predecessors, NASA shifts its focus to look for other ingredients for life, including possibly organic carbon, the building block for life on Earth.

"It's a long shot, but we're going to try," Grotzinger told reporters before launch.

Curiosity is powered by heat from the radioactive decay of plutonium. It is designed to last one Martian year, or 687 Earth days.

United Launch Alliance is a partnership of Boeing and Lockheed Martin.

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