By Will Dunham
WASHINGTON (Reuters) – The rock organism called Bennu has been classified as an asteroid near Earth, making it the closest approach to the Earth every six years about 186,000 miles (299,000 km). It may be more approaching in the future, as scientists appreciate one opportunity in 2700 collisions with Earth in September 2182.
So what will happen should be hit by the sons of our planet? Well, it will not be great, according to a new research based on a computer simulation by the asteroid with a diameter of approximately three tenths of mile (500 meters) like Bennu.
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Regardless of the immediate destruction, this effect would be 100-400 million tons of dust in the atmosphere, causing climate disorders and chemistry in the atmosphere and global optical representation that lasts from three to four years.
“The solar blackout due to dust would cause a sudden global” winter “that is characterized by low sunlight, cold temperature and low rains on the surface.” . Busan National University in South Korea and the author of the study published this week in the magazine of Science Advances.
In the worst scenario of cases, the researchers found that the average surface temperature for the earth will decrease by about 7 degrees Fahrenheit (4 degrees Celsius), and the average rainfall decreases by 15 %, and there will be a decrease of up to 20-30 % in The plant is optical and 32 % depletion in the ozone layer of the planet that protects against harmful solar ultraviolet radiation.
The researchers said that the effect of a Banu -sized -sized asteroid – on the surface of the Earth generates a strong shock wave, earthquakes, forests and heat radiation, leaves a Herfa hole and exits huge amounts of debris up.
Large quantities of gases and gases will reach the upper atmosphere, causing long effects on the climate and ecosystems, according to Dai and Senior Senior Author Axel Timmermann, a climate physicist and ICCP manager.
They said that unfavorable climatic conditions will prevent plant growth on the ground and in the ocean.
“Unlike the rapid reduction and slow recovery for two years of plants on the ground, plankton in the ocean will recover within six months-until it increases with unprecedented Diatom (a type of algae) that blooms in the ocean.
The researchers said that the depletion of extreme ozone may occur in the stratosphere – the second layer in the atmosphere while ascending – due to the strong warming caused by solar absorption of dust molecules.
The asteroid collision of this size can cause tremendous loss in human life, but this account was out of study. Dai said that the potential death toll “depends mainly on the place where the asteroid’s effect occurs.”
Scientists know a lot about Bennu, and the “ruins” is a asteroid – a loose mixture of rock materials instead of a solid being. It is a rocky residue of a larger celestial body formed near the dawn of the solar system about 4.5 billion years ago. The robotic spacecraft from NASA Osirris-Rix traveled to Pino and in 2020 she collected samples of rocks and dust for analysis.
A study published in January showed that Bennu’s samples carry some chemicals of life, strong evidence that asteroids may have silenced early Earth with raw ingredients that strengthened the appearance of living organisms.
The asteroids hit the Earth from time to time on their long history, often with catastrophic results. Aster is estimated at 6-9 miles (10-15 km) on the coast of the Yousan Peninsula in Mexico 66 million years ago, which led to the elimination of about three quarters of the world and the end of dinosaurs.
In 2022, NASA carried out a drunk defensive mission by using a robotic spacecraft to calm to change the course of asteroid couples, with the eye towards doing so in the future if one of them appears in a collision cycle with the Earth.
“The possibility of the asteroid Bennu hits a very small ground at 0.037 %. Timmerman said:
“So it is important to think about the risks,” added Timmerman.
(Will Doneham’s reports, edited by Rosalba Operation) participated
