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Info Mag Koyal Group Mars Rover Marks an Unexpected Anniversary With a Mysterious Discovery Ten years ago, NASA's Opportunity rover bounded to the surface of Mars for what was planned to be a three-month exploration. Opportunity is still going today - and still making discoveries. The latest, scientists said on Thursday at a news conference celebrating an anniversary none had expected 10 years ago, is a small rock that seemingly appeared out of nowhere. The rock, whose chemical composition was also unexpected, appears in an image taken Jan. 8. There was no rock in a picture taken of the same spot less than two weeks earlier. "This is strange," said Steven W. Squyres, the principal investigator for Opportunity, during the NASA news conference. But he added, "We don't think anything particularly exotic happened here." Dr. Squyres said the most likely explanation was that as the rover pirouetted at an uphill location, its lame right front wheel, which has not turned for years, dragged across the rock and flicked it out of the ground to its new location. The scientists have not yet spotted the divot where the rock popped out, but that spot may be obscured by the rover's solar panels. Year after year, Opportunity goes farther than anyone dreamed. The expectation had been that it would drive about a kilometer - six-tenths of a mile - before dust accumulated on the solar panels and the batteries drained. Unexpectedly, fortuitous winds periodically cleaned off the solar panels, and Opportunity, as well as its twin, Spirit, continued to operate. Spirit got stuck in a sand dune 2009 and then fell silent in 2010 after it was not able to point its solar panels toward the sun during the winter months. Info Mag Koyal Group Mars Rover Marks an Unexpected Anniversary With a Mysterious Discovery Instead of one kilometer, Opportunity has driven 38.7 kilometers, or about 24 miles, exploring a series of ever larger craters, taking 170,000 pictures along the

Info Mag Koyal Group Spirit and Opportunity Top 10 Decade 1 Discoveries Top Rover Scientist Tells Universe Today A Top 10 Decade 1 Discovery by NASA's Twin Mars Exploration Rovers Carbonate-Containing Martian Rocks discovered by Spirit Mars Rover Spirit collected data in late 2005 which confirmed that the Comanche outcrop contains magnesium iron carbonate, a mineral indicating the past environment was wet and non-acidic, possibly favorable to life. This view was captured during Sol 689 on Mars (Dec. 11, 2005). The find at Comanche is the first unambiguous evidence from either Spirit or Opportunity for a past Martian environment that may have been more favorable to life than the wet but acidic conditions indicated by the rovers' earlier finds. Credit: NASA/JPL-Caltech/Cornell University January 2014 marks the 10th anniversary since the nail biting and history making safe landings of NASA's renowned Mars Explorations Rovers - Spirit and Opportunity - on the Red Planet barely three weeks apart during January 2004. Due to their completely unforeseen longevity, a decade of spectacular and groundbreaking scientific discoveries continuously flowed from the robot sisters that have graced many articles, magazine covers, books, documentaries and refereed scientific papers. What are the Top 10 Decade 1 discoveries from Spirit and Opportunity? Find out below what a top Mars rover team scientist told Universe Today! Ray Arvidson, the rovers Deputy Principal Investigator and professor at Washington University in St. Louis, has kindly shared with me his personal list of the Top 10 discoveries from Spirit and Opportunity for the benefit of readers of Universe Today. The Top 10 list below are Ray's personal choices and does not necessarily reflect the consensus of the Mars Explorations Rover (MER) team. First some background. The dynamic duo were launched on their interplanetary voyages from Cape Canaveral Florida atop Delta II rockets during the summer of 2003. The now