China News Agency, Houston, October 19th. NASA announced on the 19th that the "Osiris-Rex" probe will collect space rock samples on the surface of the asteroid "Bennu" on the 20th.

  According to NASA, this asteroid named "Bennu" has many gravels on its surface.

NASA's probe "Osiris-Rex" orbited it for nearly two years.

Currently, they are about 207 million miles from the earth.

NASA plans to collect at least 2 ounces of rock samples from a crater in "Bennu".

  NASA said that NASA has collected some space rock samples, such as moon gravel, comet dust and solar wind particles.

If this mission is successful, it will be the largest space rock sample ever collected by NASA.

  According to a report by USA Today, the mission’s chief scientist Dante Loretta said on the 19th that the asteroid "Bennu" existed when the solar system was formed 4.5 billion years ago, and its surface has a large amount of carbonaceous materials. Research on samples of this asteroid will help humans understand the origin of the earth.

  According to NASA, the entire mission will take 4.5 hours.

Researchers have pre-written operating procedures, so this task is automatically completed by the detector.

  The probe will first pass through a long narrow space to reach the top of a crater in the northern hemisphere of "Bennu".

The crater named "Nightingale" is 52 feet in diameter, about the size of a tennis court.

  After that, the probe will perform a landing and sampling mission: the probe will "extend" an 11-foot-long robotic arm to contact the surface of the asteroid.

The detector will also spray pressurized nitrogen and suck away the dirt and gravel on its surface.

The sampling time is 5 to 10 seconds.

  Finally, the probe will ignite the booster away from the surface of the asteroid.

  The probe will send data back to the earth to help researchers judge whether the mission was successfully executed.

If all goes well, the probe is expected to send samples back to Earth in 2023.

  According to the Associated Press, "Bennu," orbiting the sun, orbits the earth every six years.

NASA believes that its chance of hitting the Earth at the end of the next century is 1/2700.

Scientists say that the more you know about this asteroid, the safer the earth will be.

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