PASADENA, Calif. -- 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.
"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 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.
A Martian egg was found inside a meteorite that fell to Earth last year!
Scientists say they finally have proof that there is life on the Red Planet.
Professor Gupta Wickamassa told WWN that the egg was discovered when scientists were examining the inner section of a Martian meteorite that fell into the Arizona desert last year.
Wickamassa said that the rock, which he named Tootie, is rich in carbon and oxygen and stated that it could only have been produced by living organisms.
“This is one of the most exciting moments of my career. We do not know how this egg got into the rocky meteorite, but we are excited by the finding,” said Wickamassa. ”The carbon-rich particles are of uniform sizes and shapes and are not relics of some algal species.” “Tootie made it to Earth without extraterrestrial contamination, or terrestrial contamination.”
Scientists say that the egg most likely blasted from Mars when it was hit by an asteroid fifty years ago. The egg as examined at the Buckingham Centre for Astrobiology and Fordham University in the Bronx. “All the indications are that we have found evidence of life on Mars,” PhD student Jacob Weitz, who was working with Dr Wickamassa said.Weitz and Wickamassa did try to heat up the egg, hoping that it would hatch… but they had no such luck. NASA has sent a team to Professor Wickamassa’s research facility to examine the egg.
Still from mars....