US spacecraft touches asteroid surface for rare rubble grab

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US spacecraft touches asteroid surface for rare rubble grabA NASA spacecraft descended to an asteroid Tuesday and, dodging boulders the size of buildings, momentarily touched the surface to collect a handful of cosmic rubble for return to Earth. Confirmation came from the Osiris-Rex spacecraft as it made contact with the surface of the asteroid Bennu more than 200 million miles away. If successful, Osiris-Rex will return the samples in 2023.


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