나사 탐사선, 3억km 거리 소행성 베누 흙을 담았다<br /><br />A historic moment for NASA,... finally taking a sample from an asteroid something it has never done before.<br />NASA's orbiting probe touched down on the Bennu asteroid and took home some rocky substances on Tuesday.<br />Those materials could be a clue to finding the origin of the solar system.<br />"Mostly we think that Bennu has materials with hydration and organic material in them from the beginning of the solar system, so four and a half billion years ago."<br />The probe used the so-called 'touch-and-go' technique.<br />In which, the spacecraft extended an autonomous arm to Bennu's surface,...shot out a burst of nitrogen gas,... and finally trapped any materials that were kicked up.<br />All this took just 5 seconds.<br />
