• Tuesday, Jun 15, 2021
  • Last Update : 06:40 am

Nasa spacecraft starts trip back to Earth after collecting asteroid samples

  • Published at 03:36 pm May 11th, 2021
Nasa Asteroid
File Photo: A mosaic image of asteroid Bennu, composed of 12 PolyCam images collected on December 2, 2018 by the OSIRIS-REx spacecraft from a range of 24 km Reuters

The trip back to Earth will take about two years

A Nasa spacecraft, which scientists believe has collected samples from an asteroid, began its two-year journey back to Earth on Monday.

Nasa's OSIRIS-REx spacecraft is attempting to complete a mission to visit Bennu, a skyscraper-sized asteroid some 320 million km from Earth, survey the surface, collect samples and deliver them back to Earth.

Staff celebrated at the OSIRIS-REx control room in Colorado as the space vehicle pushed away from the asteroid, whose acorn-shaped body formed in the early days of our solar system. OSIRIS-REx arrived at Bennu in 2018.

The spacecraft found traces of hydrogen and oxygen molecules - part of the recipe for water and thus the potential for life - embedded in the asteroid's rocky surface, said Dante Lauretta, the OSIRIS-REx mission's principal investigator, in 2018.

The trip back to Earth will take about two years. The spacecraft will then eject a capsule containing the asteroid samples, which Nasa says will land in a remote area of Utah.

Nasa says samples will be distributed to research laboratories worldwide, but 75% of the samples will be preserved at the Johnson Space Centre in Houston for future generations to study with technologies not yet created.

The roughly $800 million, minivan-sized OSIRIS-REx spacecraft, built by Lockheed Martin, launched in 2016 to grab and return the first US sample of pristine asteroid materials. Japan is the only other country to have accomplished such a feat.

Asteroids are among the leftover debris from the solar system's formation some 4.5 billion years ago. A sample could hold clues to the origins of life on Earth, scientists say.

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