The famous asteroid mysteriously launches particles into space: NASA does not know why - ForumDaily
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The famous asteroid mysteriously launches particles into space: NASA does not know why

Asteroid Bennu, who can answer questions about the origin of our solar system, mysteriously launches particles into space, and NASA does not know why. Writes about this Fox News.

Фото: Depositphotos

Since December 2018, NASA has observed numerous particle emissions, including three major ones on January 6, January 19 and February 11. The researchers found that the particles either orbited Bennu, returned to it, or left their orbit and went into outer space. The largest event, which occurred on January 6, resulted in the ejection of "approximately 200 particles" from the asteroid, NASA said in a blog post.

Particles move very fast and range in size from less than an inch (2,54 cm) to 4 inches (10,16 cm). According to a NASA blog post, a mysterious release can be caused by three different causes: meteorite impacts, thermal stress destruction, and the release of water vapor.

NASA added that collisions with meteorites are often found in the “outer space” where Bennu is located, noting that they are possible when the spacecraft OSIRIS-REx does not observe him.

Thermal rupture may also play a role due to the significant temperature changes that Bennu experiences during its 4,3-hour rotation period. The asteroid's surface "heats significantly" during the middle of the day, which is when large particle ejections occur, leading to theories that temperature causes cracking, fracture and ultimately ejecta.

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In December 2018, NASA discovered that there was water in its structure, which could also cause particles to release when the water heats up and the pressure rises.

Particle ejection can also be a combination of all three methods, said Steve Chesley, lead author of the study.

“It may be that more than one of these possible mechanisms are at play,” Chesley said. “For example, thermal rupture can cause surface material to be crushed into small pieces, making it much easier for meteorites to eject rocks into space.”

NASA posted the video on its YouTube page, adding additional particle emission information.

“Among Bennu's many surprises, particle emissions have piqued our curiosity, and we have spent the last several months investigating this mystery,” said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona in Tucson. “This is a great opportunity to expand our knowledge of how asteroids behave.”

OSIRIS-REx was launched in September 2016 from the Air Force station at Cape Canaveral. It has five instruments for data collection and is designed to return with asteroid samples in September 2023.

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