How to use defense technology to deal with the "asteroid hit the earth"?The U.S. Aerospace made a test

"Asteroid hit the earth" is a plot in many science fiction movies. Once this situation is about to happen in reality, can humans be effective? The "Double Planet Reset of DART) Aerospace in the United States Space Agency" intentionally "hit a near -earth planet on the 26th, which is a defense test for similar situations.

At 19:14 on the 26th of Eastern Time (7:14 on the 27th of Beijing time), the Dart spacecraft of the United States Aerospace Institute hit a smaller small planet called "dual form" in a near -ground dual small stars system. , With a view to changing its running track. The United States Aerospace Administration said this is the first time that the world aims to protect the earth from the threat of the asteroid impact threat.

The DART spacecraft weighs about 570 kilograms. The main size is equivalent to a car. There is a solar panel with a fully 8.5 meter length on each side. It is equipped with a high -resolution camera and an automatic navigation system. It launched a launch from the Vandenburg Space Army Base in California, California on November 24, 2021, and arrived near the target area about 10 months after the flight.

This is a test task of "there is no return". On the 26th, the high -resolution camera equipped with the DART spacecraft recorded the picture when the impact was recorded. The picture was then interrupted, marking the impact as planned. According to the U.S. Aerospace Administration, the running speed of the DART spacecraft was about 22530 kilometers per hour at the time of impact, and the impact of the "dual -form" asteroid was about 11 million kilometers from the earth.

According to reports, the "dual -form" asteroid that was hit this time is a smaller volume in a near -ground dual -line star system with a diameter of about 160 meters. Planet flight, the latter is about 780 meters in diameter. These two asteroids have no threat to the earth.

The US Aerospace Administration said that the DART spacecraft's impact asteroid mission aims to test a feasible relief strategy to protect the earth's threat from the potential impact of small or comets. The task has shown that it can be successfully collided with the small planet through the spacecraft independent navigation, causing the asteroid to deviate from the original track. This technology is called a kinetic impact technology.

The research team will use the ground telescope to observe the impact of DART spacecraft to deviate from the "dual -form" asteroid departing from the original track. Researchers predict that this impact will shorten the orbit of the "dual -form" asteroid around the "twins" asteroid by 1%, which will shorten the detour's orbital cycle for about 10 minutes.

In the future, the European Space Administration will launch the "Hera" task spacecraft to study the impact of this impact on the dual small asteroid system. "Hera" will conduct detailed observations of two asteroids, especially the quality of the "dual form" asteroid of the "dual form" asteroid in the impact of the impact.

According to the official website of the United States Aerospace Office, "near the earth" refers to a small asteroid or comet that can pass within a range of 50 million kilometers from the Earth orbit. Inside and "nearly celestial body" with a diameter greater than 140 meters. Most small asteroids are relatively small. Most of the small asteroids who want to "close contact" with the earth each year are decomposed in the earth atmosphere.

According to the U.S. Aerospace Administration, although there are no asteroids with no known diameter more than 140 meters in the next 100 years, there is a substantial risk of impacting the earth, but only about 40%of these asteroids have been detected and found.

The kinetic impact is a relatively simple and technical method for defense asteroids to hit the earth. Using this technology, the spacecraft emitted by humans can directly hit the threatening asteroid at a speed of several kilometers per second.

The U.S. Aerospace Administration said that DART impact testing data will provide data support for improving the scientific computing model, which is essential for "prediction and verification of kinetic energy impact on the effectiveness of planet defense". Lindley Johnson, an official in charge of the planetary defense project, said in a bulletin that the success of DART mission provided an important supplement to protect the Earth from the basic toolbox of the devastating impact of small stars.

According to reports, the United States Astronautics will also check a series of innovative technologies through the DART impact test, including the spacecraft autonomous real -time navigation algorithm, new solar cell array technology, and solar ion promotion system. (Reporter Tan Jingjing)

(Source: Xinhua News Agency client)

【Edit: Fu Sakura】

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