NASA's plan to scoop up dirt and gravel from an asteroid has hit a snag.
NASA's plan to scoop up dirt and gravel from an asteroid has hit a snag, but scientists say they can overcome it.
In a paper released Tuesday by the journal Nature, scientists say they plan to take a closer look at a few smaller areas that might work. They said sampling from those spots poses"a substantial challenge." The spacecraft, called Osiris-Rex, is scheduled to descend close to the surface in the summer of 2020. It will extend a robot arm to pick up the sample, which will be returned to Earth in 2023. The spacecraft began orbiting Bennu at the end of last year, after spending two years chasing down the space rock.
"It is a more rugged surface than we predicted," said Lauretta, of the University of Arizona in Tucson and one of the paper's authors. But he said he believed a sample could still be collected.
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