NASA probe Osiris-Rex set to 'kiss' asteroid Bennu in historic mission
The big day has arrived for the American probe Osiris-Rex: after four years of travel, it will hit the asteroid Bennu to pick up a few tens of grams of dust, a high-precision operation 320 million kilometers away from Earth. (Photo by Handout / NASA/Goddard/Arizona State University / AFP) WASHINGTON: After a four-year journey, NASA's robotic spacecraft Osiris-Rex will descend to asteroid Bennu's boulder-strewn surface on Tuesday, touching down for a few seconds to collect rock and dust samples in a precision operation 200 million miles (330 million kilometers) from Earth. Last year, Japan managed with its Hayabusa2 probe to collect some dust from another asteroid, Ryugu, and is now on its way home. With Osiris-Rex, NASA hopes to collect a much larger sample -- at least 60 grams -- which it hopes will reveal the original ingredients of the solar system. The spacecraft, about the size of a large van, is at this moment in position about a kilometer above Bennu, which is 490 me