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Mars Rover Reaches Rim of Deep Crater

The Mars Rover Opportunity has edged closer to the rim of a large crater that scientists thought it could never reach after an arduous 21-month trek, said NASA Wednesday.


Scientists are increasingly confident that their robotic explorer had reached a scientific gold mine that will dramatically increase their understanding of the planet's history -- especially whether water still exists there.


NASA scientists said the rover came within about 15 feet (about 4.5 meters) of Victoria Crater's rim and was scheduled to climb over a small sand dune Wednesday night and stop right at the crater's edge.


"The pictures we got tell us there is a tremendous amount of geologic information hidden in that crater," said Steven Squyres of Cornell University, principal science investigator for the mission.


"What secrets it actually holds we won't know till we begin to get the data. But yesterday's picture alone makes the voyage worthwhile. This is a geologist's dream come true.


"Those layers of rock, if we can get to them, will tell us new stories about the environmental conditions long ago," he continued. "We especially want to learn whether the wet era that we found recorded in the rocks closer to the landing site extended farther back in time."


Opportunity has lasted 10 times as long as the 90 days NASA originally projected. It has been exploring Mars since January of 2004 and traveled more than 5.7 miles (about 9.2 km).


The rover will spend a day looking for a more favorable spot around the rim to take a panorama photo of the vista. Meanwhile, scientists are plotting Opportunity's next move and analyzing the images to find the safest route for the rover to enter the crater.


Opportunity and Spirit, the other rover, have been exploring opposite sides of Mars since landing in 2004. Both uncovered geologic evidence of past water activity on the planet.


The rovers, managed by NASA's Jet Propulsion Laboratory in Pasadena, have outlasted their primary, three-month mission. According to the space agency, the rovers' mission will be extended for at least one more year.


(Xinhua News Agency September 28, 2006)


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