IT House reported on December 21 that the latest research by scientists analyzed samples retrieved by the Japanese Hayabusa2 team on the asteroid Ryugu and confirmed that these black particles are the most primitive known material in the solar system.
IT House learned that Hayabusa2 is a Japanese asteroid sampling mission, launched in 2014, arrived at the asteroid Ryugu in 2018 and collected 5.4 grams of samples, and finally successfully returned the samples to Earth.
▲ Source: Hayabusa 2 Project Official
In December 2020, hayabusa2 spacecraft collected rock samples from the surface of the Ryugu asteroid and will use survey data obtained from the spacecraft's other instruments to further reveal the history of the mysterious asteroid.
▲ 图源：Yada et al. / Nature Astronomy 2021
The official science and technology committee of the China Aerospace Science and Technology Corporation said that these samples have a return rate of only 2%, which is darker than most meteorites, and it also contains hydrates and organic matter, which may exist when these particles are gathered from the protoplanetary disk.
It is reported that the average density of these materials is lower than that of all meteorites, and there are no structures such as chondrites formed by condensation of molten material inside, indicating that these particles have not undergone changes such as external heating for billions of years.