Shulou(Shulou.com)11/24 Report--

CTOnews.com, Aug. 21 (Xinhua) A new study by scientists analyzed samples taken by the Japanese Hayabusa 2 team from the asteroid Ryugu, confirming that these black particles are older dust particles than the solar system itself.

In fact, some scientists have found such ancient materials in carbonaceous chondrite meteorites before. These meteorites contain secrets in the depths of the universe. After crossing the long universe, they fall from the starry sky and cross the sky, and very few of them survive the friction of the atmosphere. Finally landed on this earth, so that you and I can see together.

The main particle in the Longgong sample is silicon carbide, a compound that cannot exist naturally on Earth. According to the researchers behind the new study, there are different kinds of silicon carbide particles that differ in what scientists call isotopic characteristics, or the number of neutrons in the silicon and carbon nuclei that make up the compound.

In the Dragon Palace sample, the researchers found previously known types of silicon carbide, but also found an extremely rare silicate that could be easily destroyed by chemical processes taking place in asteroids, but it did survive.

The material was "found in a fragment with fewer chemical changes and is likely to protect it from such activities," the researchers said in a statement.

The success of the study was published in the Astrophysical Journal KuaiBao on August 15. In fact, a separate study was published in the journal Nature Astronomy on August 16. Scientists used a different type of isotope analysis, as well as other research techniques called scanning transmission X-ray microscopy.

According to a statement, the substance is virtually unable to withstand temperatures above 86 degrees Fahrenheit (30 degrees Celsius), and other findings suggest that the Dragon Palace formed outside the solar system and came to us for some reason.

"the opportunity to identify and study these particles in the laboratory can help us understand the astrophysical phenomena that shape our solar system and other cosmic objects," Larry Nittler, a planetary scientist at Arizona State University and co-author of the study, said in a statement.

CTOnews.com learned that Hayabusa 2, a Japanese asteroid sampling mission, was launched in 2014, arrived at the asteroid Dragon Palace in 2018 and collected 5.4g samples and finally successfully sent them back to Earth.

▲ source: Hayabusa 2 project official

In December 2020, the Hayabusa 2 spacecraft collected rock samples from the surface of the Longgong asteroid and will use survey data from other instruments of the spacecraft to further reveal the history of the mysterious asteroid.

▲ source: Yada et al. / Nature Astronomy 2021

The official science and technology committee of the China Aerospace Science and Technology Corporation said that the albedo of these samples is only 2%, which is darker than most meteorites, and also contains hydrate and organic matter. it may have existed when these particles 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 spherical particles formed by condensation of molten material, indicating that these particles have not undergone changes such as external heating for billions of years.

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