NASA Selects Additional Companies for Construction Contracts at Stennis
Previous
RANDOM
First Planets Found Around Sun-Like Stars in a Cluster
Next

NASA Mars Rover Opportunity Reveals New Geological Mystery

by William W. on September 14, 2012
NASA

Sept. 14, 2012 – NASA‘s long-lived rover Opportunity has returned an image of the Martian surface that is puzzling researchers.

Spherical objects concentrated at an outcrop Opportunity reached last week differ in several ways from iron-rich spherules nicknamed “blueberries” the rover found at its landing site in early 2004 and at many other locations to date.

Opportunity is investigating an outcrop called Kirkwood in the Cape York segment of the western rim of Endeavour Crater. The spheres measure as much as one-eighth of an inch (3 millimeters) in diameter. The analysis is still preliminary, but it indicates that these
spheres do not have the high iron content of Martian blueberries.

blueberries mars

Older “blueberries”

“This is one of the most extraordinary pictures from the whole mission,” said Opportunity’s principal investigator, Steve Squyres of
Cornell University in Ithaca, N.Y. “Kirkwood is chock full of a dense accumulation of these small spherical objects. Of course, we
immediately thought of the blueberries, but this is something different. We never have seen such a dense accumulation of spherules
in a rock outcrop on Mars.”

The Martian blueberries found elsewhere by Opportunity are concretions formed by action of mineral-laden water inside rocks, evidence of a
wet environment on early Mars. Concretions result when minerals precipitate out of water to become hard masses inside sedimentary
rocks. Many of the Kirkwood spheres are broken and eroded by the wind. Where wind has partially etched them away, a concentric structure is evident.

Opportunity used the microscopic imager on its arm to look closely at Kirkwood. Researchers checked the spheres’ composition by using an
instrument called the Alpha Particle X-Ray Spectrometer on Opportunity’s arm.

“They seem to be crunchy on the outside, and softer in the middle,” Squyres said. “They are different in concentration. They are
different in structure. They are different in composition. They are different in distribution. So, we have a wonderful geological puzzle
in front of us. We have multiple working hypotheses, and we have no favorite hypothesis at this time. It’s going to take a while to work
this out, so the thing to do now is keep an open mind and let the rocks do the talking.”

Just past Kirkwood lies another science target area for Opportunity. The location is an extensive pale-toned outcrop in an area of Cape
York where observations from orbit have detected signs of clay minerals. That may be the rover’s next study site after Kirkwood.
Four years ago, Opportunity departed Victoria Crater, which it had investigated for two years, to reach different types of geological
evidence at the rim of the much larger Endeavour Crater.

The rover’s energy levels are favorable for the investigations. Spring equinox comes this month to Mars’ southern hemisphere, so the amount
of sunshine for solar power will continue increasing for months.

“The rover is in very good health considering its 8-1/2 years of hard work on the surface of Mars,” said Mars Exploration Rover Project
Manager John Callas of NASA’s Jet Propulsion Laboratory in Pasadena, Calif. “Energy production levels are comparable to what they were a
full Martian year ago, and we are looking forward to productive spring and summer seasons of exploration.”

NASA launched the Mars rovers Spirit and Opportunity in the summer of 2003, and both completed their three-month prime missions in April
2004. They continued bonus, extended missions for years. Spirit finished communicating with Earth in March 2010. The rovers have made
important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life.

JPL manages the Mars Exploration Rover Project for NASA’s Science Mission Directorate in Washington.

To view the image of the area, visit:

http://go.nasa.gov/Q92Rjn

For more information about Opportunity, visit

http://www.nasa.gov/rovers

and

http://marsrovers.jpl.nasa.gov

You can follow the project on Twitter and on Facebook at:

http://twitter.com/MarsRovers

and

http://www.facebook.com/mars.rovers

William W.
I am an amateur astronomer with a focus on astrophotography and deep space objects. I have 15+ years in the web publishing business and over 20 years as a space enthusiast. I enjoy reading and writing about the amazing discoveries of brilliant scientists and engineers.
 
READ MORE

Telsa Motors Launches Battery Swap Pilot Program

 
READ MORE

SpaceX Completes First Milestone for Commercial Crew Transportation System

 
READ MORE

NASA Awards SpaceX Launch of Transiting Exoplanet Survey Satellite


 
READ MORE

NASA Rover Finds Active and Ancient Organic Chemistry on Mars

 
READ MORE

Venus Express goes gently into the night

 
READ MORE

NASA’s MAVEN Mission Identifies Links in Chain Leading to Atmospheric Loss


 
READ MORE

NASA Tests Software That May Help Increase Flight Efficiency, Decrease Aircraft Noise

 
READ MORE

SpaceX set to create 300 new US jobs

 
READ MORE

Lockheed Martin Wins Medium Lift Contract in Alaska


 
READ MORE

Arianespace’s upcoming Soyuz mission receives its “identity” at the Spaceport

 
READ MORE

U.S. Geological Survey releases highest-resolution geologic map of Mars

 
READ MORE

NASA All About That Space – All About That Bass Parody Music Video


 
READ MORE

Warm Gas Pours ‘Cold Water’ on Galaxy’s Star-Making

 
READ MORE

Scientists Warn That Cosmic Rays Will Threaten Future Deep-Space Astronaut Missions

 
READ MORE

New Horizons Pluto probe wakes up after 1,873 days in hybernation


Load More
End of the line!
Fonts by Google Fonts. Icons by Fontello. Full Credits here »