1. Headline
  1. Headline
Image: Opportunity waypoints
NASA / JPL
While the Spirit rover waits out cold weather, mission managers for the Opportunity rover have mapped out its course in Meridiani Planum. After examining a rock named Stone Mountain, Opportunity is taking pictures of bedrock outcroppings, including another rock called El Capitan.
By Science Writer

Cold on Mars forced NASA to keep its Spirit rover parked for a day, interrupting a planned monthlong drive to a nearby crater, the space agency said Wednesday.

NASA could not send commands to Spirit late Tuesday because the cold prevented the rover from rotating a high-gain antenna toward Earth. The rover’s motors, used to position the antenna, were under a frigid shadow.

“It’s very similar to starting your car on a cold day,” said project manager Pete Theisinger.

NASA routinely warms the motors by passing an electric current through them. However, engineers had not set the current limit high enough to compensate for the lower-than-normal temperature of the shaded motors.

  1. More from TODAY.com
    1. The 10 things I wish I'd known before getting divorced

      As a divorce mediator for many years, I thought I was more prepared than anyone for what lay ahead as I faced my own divor...

    2. Making this 'super' dip bowl out of a cabbage is easier than it looks!
    3. Boy meets curl: How I survived the '90s and learned to love my hair
    4. Watch the world go nuts in Mophie's Super Bowl ad
    5. Despite all the NFL scandals, here's why my family still loves footbal

The space agency got the antenna pointing in the right direction later in the day. By then, it was too late to continue the journey.

Temperatures on Mars can reach 100 degrees below zero Fahrenheit (-70 degrees Celsius), which is about the coldest it gets at Earth's South Pole.

NASA planned for Spirit to resume moving overnight Wednesday, when scientists want it to travel nearly 83 feet (25 meters) toward a crater about 800 feet (250 meters) away.

Earlier this week, Spirit traveled a record 70 feet (21.2 meters) across the rocky Martian surface. Scientists planned for Spirit to reach the crater within the next three weeks.

Spirit’s twin, Opportunity, continued to scoot along a rock formation at its landing site halfway around the planet. It has been taking detailed pictures of the finely layered rocks. Initial results suggest the rocks formed from volcanic ash or compacted, windblown dust.

NASA sent the two rovers on an $820 million mission to look for geologic evidence that ancient Mars had liquid water for a long enough time to permit the development of life.

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

Discuss:

Discussion comments

,

More on TODAY.com

  1. Bacho / Shutterstock

    The 10 things I wish I'd known before getting divorced

    1/29/2015 10:21:52 PM +00:00 2015-01-29T22:21:52
  1. Jeff Schear / Getty Images for Michigan Avenue

    Kristin Cavallari shares Jay Cutler’s relatable parenting texts

    1/29/2015 8:47:48 PM +00:00 2015-01-29T20:47:48
  1. Samantha Okazaki / TODAY

    Matt Lauer reveals secret talent, favorite parts of fatherhood in Q&A

    1/29/2015 6:33:41 PM +00:00 2015-01-29T18:33:41
  1. EPA, Getty Images

    The 9 hottest hairstyles of 2015 — and how to ask for the look

    1/29/2015 7:37:24 PM +00:00 2015-01-29T19:37:24
  1. Gas blast at Mexico maternity hospital, dozens hurt

    A gas truck exploded on Thursday and leveled part of a maternity and children’s hospital in Mexico City. City officials said a woman and a child were killed.

    1/29/2015 4:55:01 PM +00:00 2015-01-29T16:55:01