1. Headline
  1. Headline
Image: Robotic arm and El Capitan
NASA - JPL
A picture from the Opportunity rover's front hazard avoidance camera shows the probe's robotic arm extended over a Martian outcropping nicknamed El Capitan.
updated 2/25/2004 3:13:11 PM ET 2004-02-25T20:13:11

NASA's Opportunity rover ground into a rock outcrop on Mars, and excited scientists prepared to examine its makeup to learn whether it was formed under watery conditions favorable to life, mission members said Tuesday.

The robotic field geologist used its rock abrasion tool to grind a sixth of an inch (4 millimeters) into the surface of a rock dubbed "El Capitan," project manager Richard Cook said.

The rover then began to inspect the round hole with other instruments on its robotic arm. Those instruments are designed to reveal the mineralogical and elemental composition of the freshly exposed rock, as well as photograph it in microscopic detail.

'Christmas Eve' on Mars
"It's Christmas Eve, and all the scientists are anxious and excited with anticipation for what they are going to show," deputy main scientist Ray Arvidson said of the measurements.

Results were expected to take several days to reach Earth.

The rock outcrop is about the height of a curb and rings a portion of the crater that cradles the unmanned rover. Previous microscopic images show fine layering in the rock, including "El Capitan," as well as mysterious BB-sized granules.

Scientists involved in the $820 million mission continued to mull multiple theories of how the glossy, sandblasted rock formed, including through processes that involved volcanic eruptions, windblown dust or sediments settling out of a body of water.

The new data could settle the issue.

Spirit still rolling
Halfway around Mars, Opportunity's twin, Spirit, continued to roll toward a crater, traveling nearly 100 feet (30 meters) on Tuesday. NASA planned to send the rover a short distance farther, then pause for a few days for science observations, Cook said.

Spirit is between 280 and 300 feet (90 meters) from the crater nicknamed "Bonneville." Scientists expect the rover will reach its rim and peer into it for the first time in mid-March, Arvidson said.

Scientists consider such impact craters "windows" into the geologic past of Mars, since they can churn up rocks from deep below the surface that may contain evidence of past water activity that the two rovers were designed to seek.

© 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Discuss:

Discussion comments

,

Most active discussions

  1. votes comments
  2. votes comments
  3. votes comments
  4. votes comments

More on TODAY.com

  1. Courtesy Aldrich Family

    ‘Extraordinary’ 8-year-old boy finishes triathlon with his disabled brother

    7/22/2014 4:35:28 PM +00:00 2014-07-22T16:35:28
  1. Feds ban airlines from flying to Tel Aviv airport

    Federal aviation officials issued an order to airlines prohibiting them from flying to and from Tel Aviv’s Ben Gurion International Airport for 24 hours after a rocket struck near the airport earlier Tuesday.

    7/22/2014 5:43:01 PM +00:00 2014-07-22T17:43:01
  2. Dutch collect DNA to match with MH17 victims
  1. Pool / Reuters

    Prince George's birthday: The royal tot's 10 cutest moments

    7/22/2014 1:11:51 PM +00:00 2014-07-22T13:11:51
  1. Khakimullin Aleksandr / Shutterstock / Khakimullin Aleks

    The 5 best exercises for tank top-worthy arms

    7/22/2014 8:56:50 PM +00:00 2014-07-22T20:56:50
  1. Coke is a stain remover? 6 surprising cleaners in your home

    From those annoying white deodorant stains on your little black dress to rust stains in the commode, some stains just won't go away — until now. With help from some savvy experts, we put together surprising tips to banish these stains once and for all.

    7/22/2014 4:48:22 PM +00:00 2014-07-22T16:48:22
  1. Robyn Beck / AFP - Getty Images

    Chris Pratt wows us — and his wife — on 'Guardians' red carpet

    7/22/2014 7:16:22 PM +00:00 2014-07-22T19:16:22