Mars Exploration on Overdrive

NASA's newest Mars rover is headed for the Red Planet, a 1-ton robotic beast that will take planetary exploration to the next level. The car-size Curiosity rover is the centerpiece of NASA's $2.5 billion Mars Science Laboratory (MSL) mission, slated to blast off Saturday (Nov. 26) from Cape Canaveral Air Force Station in Florida. Curiosity's main goal is to assess whether the Red Planet is, or ever was, capable of supporting microbial life.

The rover will employ 10 different science instruments to help it answer this question once it touches down on the Red Planet in August 2012. Here's a brief rundown of these instruments (and one more on the rover's heat shield):

Curiosity's Eyes

The Mast Cam is Curiosity's workhorse imaging tool. It will capture high-resolution color pictures and video of the Martian landscape, which scientists will study and laypeople will gawk at. Mast Cam consists of two camera systems mounted on a mast that rises above Curiosity's main body, so the instrument will have a good view of the Red Planet environment as the rover chugs through it. Mast Cam images will also help the mission team drive and operate Curiosity. [Photos of NASA's Curiosity Rover]

A Sleuth on Mars

MAHLI will function much like a high-powered magnifying glass, allowing Earthbound scientists to get up-close looks at Martian rocks and soil. The instrument will take color pictures of features as tiny as 12.5 microns — smaller than the width of a human hair.
MAHLI sits on the end of Curiosity's five-jointed, 7-foot (2.1-meter) robotic arm, which is itself a marvel of engineering. So mission scientists will be able to point their high-tech hand lens pretty much wherever they want.


The View From Above

MARDI, a small camera located on Curiosity's main body, will record video of the rover's descent to the Martian surface (which will be accomplished with the help of a hovering, rocket-powered sky crane). [Video: Curiosity's Peculiar Landing] MARDI will click on a mile or two above the ground, as soon as Curiosity jettisons its heat shield. The instrument will then take video at five frames per second until the rover touches down. The footage will help the MSL team plan Curiosity's Red Planet rovings, and it should also provide information about the geological context of the landing site, the 100-mile-wide (160-km) Gale Crater.

Sampling Mars

SAM is the heart of Curiosity; at 83 pounds (38 kilograms), it makes up about half of the rover's science payload. SAM is actually a suite of three separate instruments — a mass spectrometer, a gas chromatograph and a laser spectrometer. These instruments will search for carbon-containing compounds, the building blocks of life as we know it. They will also look for other elements associated with life on Earth, such as hydrogen, oxygen and nitrogen.

The SAM instrument suite is located in Curiosity's main body. The rover's robotic arm will drop samples into SAM via an inlet on the rover's exterior. Some of these samples will come from the interior of rocks, powder bored out by a 2-inch (5-centimeter) drill situated at the end of the arm.

None of Curiosity's predecessors could get deep into Martian rocks, so scientists are excited about the drill.

"For a geologist that studies rocks, there's nothing better than getting inside," said MSL deputy project scientist Joy Crisp, of NASA's Jet Propulsion Laboratory in Pasadena, Calif.