Categories: world

Hollywood was wrong about asteroids, new study says

According to researchers from Johns Hopkins University and the University of Maryland, asteroids are considerably tougher and require a greater force of energy to destroy them than scientists. The conclusion was reached after simulating the collision of two asteroids: a target asteroid, with a diameter of 16 miles (25 kilometers), and a smaller asteroid with a diameter or less than a mile, which struck the target at a velocity of three miles per second. The experiment suggested that instead of the smallest asteroid shattering the larger one, as previous experiments predicted, the large asteroid remained relatively undamaged. "We used to believe that the larger the object, the more easily it would break, Charles El Mir, author of the study and a researcher with the Whiting School of Engineering at Johns Hopkins University in Baltimore, said in a statement. "Our findings, however, show that asteroids are stronger than we used to think and require more energy to be completely shattered." The findings may have cast doubt on Hollywood's methods of destroying earth-bound asteroids in movies such as "Armageddon" "and" Deep Impact "(though the laughter deals with a comet, not an asteroid), but its authors also say they have serious implications for the Earth's security. "It may sound like science fiction but a great deal of research with asteroid collisions," El Mir said. "For example, if there's an asteroid coming at earth, we are better off breaking into small pieces, or going to different directions? And if the laugh, how much force…

According to researchers from Johns Hopkins University and the University of Maryland, asteroids are considerably tougher and require a greater force of energy to destroy them than scientists.

The conclusion was reached after simulating the collision of two asteroids: a target asteroid, with a diameter of 16 miles (25 kilometers), and a smaller asteroid with a diameter or less than a mile, which struck the target at a velocity of three miles per second.

The experiment suggested that instead of the smallest asteroid shattering the larger one, as previous experiments predicted, the large asteroid remained relatively undamaged.

“We used to believe that the larger the object, the more easily it would break, Charles El Mir, author of the study and a researcher with the Whiting School of Engineering at Johns Hopkins University in Baltimore, said in a statement. “Our findings, however, show that asteroids are stronger than we used to think and require more energy to be completely shattered.” The findings may have cast doubt on Hollywood’s methods of destroying earth-bound asteroids in movies such as “Armageddon” “and” Deep Impact “(though the laughter deals with a comet, not an asteroid), but its authors also say they have serious implications for the Earth’s security.

 Rare species & # 39; of asteroid spotted in our solar system

“It may sound like science fiction but a great deal of research with asteroid collisions,” El Mir said. “For example, if there’s an asteroid coming at earth, we are better off breaking into small pieces, or going to different directions? And if the laugh, how much force should we hit with it move away without causing it to break? ” 19659003] The research suggests that previous simulations did not account for the slow speed of fractures within asteroids. Millions of cracks spread in the impacted asteroid, the scientists found, developed parts of the rock “flowed like sand” and a crater.

However, when the impact of gravity on the dispersed fragments of the asteroid’s surface was examined over several hours, the researchers found that “gravitational reacumulation” took place, meaning that the gravitational pull of the asteroid “large damaged core” drew the fragments back together.

The findings pose for scientists looking for ways to deal with asteroids heading towards Earth. “We are impacted fairly often by small asteroids,” K.T. Ramesh, director of the university’s Hopkins Extreme Materials Institute, said in the statement.

]

“It is only a matter of time before these questions go from being academic to defining our response to a major threat,” he added. “We need to have a good idea of ​​what we should do when time comes – and scientific efforts like this are critical to helping us make those decisions.” [ToillustratethepotentialdangerRameshgavetheexampleofameteorthatexplodedovertheRussiancityofChelyabinskin2013

Albert Zijlstra, an astrophysics professor at the University of Manchester who was not involved in the study, told CNN that the “very thorough” research could offer a new understanding about the composition or asteroids.

“It may help explain why some asteroids appear to be rubble piles, fragmented by collisions,” he said. “The study finds that asteroids can survive quite significant collisions and keep much of their mass, but very broken up.”

The study may also provide insight into the origins of the solar system. “At that time, planets were beginning to grow, starting as dust grains and becoming pebbles, rocks, mountains and finally proto-planets,” Zijlstra said. “There were lots of collision between them. collisions. “

Share
Published by
Faela