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A particle ejection event was observed in the asteroid bennu.

NASA's OSIRIS-REx spacecraft has revealed that strange phenomena have been occurring in the asteroid Bennu for some time.When the mission team tested Tata, they found that the asteroid could be active, or continuously discharge particles into space.The events happening in the asteroid Bennu can be answered only when a sample of the asteroid is brought to Earth, and it is studied.Then the curtain can arise from this, what is the reason, of these events happening in the asteroid Bennu.

By the way, everyone knows that the asteroid Bennu is an astronomical body, which continuously rotates in the universe, and is smaller than all the planets, and it is larger in size than the meteorite.Researchers believe that if we study the asteroid closely, we can know how the presence of life on Earth happened.

NASA launched the OSIRIS-REx spacecraft on 8 September 2016, to study the asteroid Bennu closely.The purpose of which is to study the asteroid Bennu closely, and bring its sample to Earth, to find out whether the asteroid Bennu may have been part of a larger planet.

When the OSIRIS-REx spacecraft approached the asteroid Bennu, the mission team first noticed a particle ejection event in the images taken on January 6 by the spacecraft's navigation cameras.

While entering the first orbit of the OSIRIS-REx spacecraft asteroid Bennu, the mission team noticed that the particles looked like stars behind the asteroid.When it was studied closely, it was found that the stars which were seen behind the asteroid were not really stars.The investigation revealed that the asteroid is ejecting material from its surface.But the best part is, these particles have not caused any harm to the OSIRIS-REx spacecraft.To document the events taking place on the asteroid, the mission team began a dedicated observation.

What OSEIS-RERX chief Dente Loretta says about the asteroid Bennu, he says, is that among the many surprises of Beanu, the particle fragments aroused our curiosity, and we spent the last several months investigating this mystery. He says, it is a mystery, how asteroids behave, and this is a great opportunity to expand our knowledge.

The mission team, after studying the results, published a letter on 6 December, in which they released their findings.Observed the three largest particle rejection events on January 6 and 19, and February 11, and concluded that the events occurred at three places on the asteroid Bennu.The first event on the asteroid occurred in the southern hemisphere, and the second and third events in the Mediterranean.It happened near Rekha, and all three incidents happened in the night.

After rejection by the mission team from the surface of the asteroid, when they studied, they found that the particles first circled and fell back to the surface.Observed by the mission, these particles were traveling up to 10 feet (3 m) per second, and ranged in size from one inch to 4 inches (10 cm).During the biggest incident on the asteroid, the mission team saw about 200 particles, the incident occurred on 6 January.

On the asteroid Bennu occurred late at night, to know about the events, why this incident has happened.When the mission team investigated a wide variety of possible mechanisms that led to the discovery, meteorite effects, thermal stress fracturing, and water vapor release, these could be three reasons.

The mission team also determined that Bennu's surface temperature varies considerably over the 4.3-hour rotation period, and is extremely cold during nighttime, but the asteroid's surface becomes significantly warmer in the afternoon, which  Caused by three major events.As a result of temperature changes, when rocks break down, causing particles to move out of the surface, this phenomenon is known as thermal stress fracturing.

The mission team says that water release can also explain the asteroid's activity.When the water of the beanu stops, this causes the water to begin to drain and create pressure. And it is possible, as soon as there is pressure in the cracks and holes in the boulder, where the absorbed water is released, and because of which The surface may be agitated, and there may be a reason, causing particles to burst.

Steve Paisley and senior research scientist at NASA's Jet Propulsion Laboratory in California say that if thermal fracturing, meteorite impacts, or both, are actually caused by these rejection events, the event is likely to occur on all small asteroids,  Because they all experience these mechanisms. However, if release of water causes these ejection events, this phenomenon would be specific to asteroids that contain water-bearing minerals such as Benue.


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