Astronomers have been shocked in recent days when an asteroid, which some refer to as "city murderer", passed within 45,000 miles of Earth last week – astronomically a rapid range.
Ground-based observers had tracked a few celestial objects that were supposed to cross near Earth orbit at about the same time, but the piece of space debris was estimated to be between 57 and 130 meters wide, only hours before it passed Earth on Thursday , discovered.
Alan Duffy of the Royal Institution of Australia said in an interview with The Washington Post that he was "stunned" and that the sudden appearance of the object, called Asteroid 2019 OK, was "a real shock." It happened "unpleasantly close," "he said.
As he passed Earth, space rock moved at a speed of 54,000 miles an hour.
This is the video of the close encounter of Asteroid 2019 OK, we've been twitting all day with Earth: https: // t .co / bjT7uhQJuO pic.twitter.com/3e4UyPcdPl  – ASAS-SN (@SuperASASSN) July 25, 2019
The astronomer Michael Brown told the US newspaper that the asteroid had come "out of nowhere" and that it "crept in pretty quickly Has".
"People just somehow understand what happened after it's thrown past us," he said. "It shook me from my morning complacency. It is probably the largest asteroid that has come so close to Earth for a number of years. "
According to Duffy, he would have scored a hit" like a very large nuclear weapon. "
According to MIT Technology Review, the "relatively small asteroid, its unusual orbit and its high speed made it all difficult to recognize it".
"We mostly use earth-based telescopes," the paper says. "A space-based infrared telescope designed specifically to detect asteroids is better suited for early detection, according to NASA. The agency therefore plans to launch the Near Earth Object Camera in 2021.
An asteroid that was less than 2019 OK injured hundreds in 2013 and damaged a synagogue when it reached Siberia. At that time, the Russian Academy of Sciences announced in a statement that the meteor over the Chelyabinsk region entered the Earth's atmosphere at a speed of at least 54,000 km / h and crashed about 30-50 km (18-32 miles) above the ground.
People are probably well acquainted with the concept of asteroid attacks from movies such as "Armageddon" and "Deep Impact" from 1998. While film heroes no longer kill asteroids with nuclear weapons and other tactics, those in places like the one NASA in real life to work on the topic, a slightly different approach too. 19659003]
According to the US Space Agency website, "it might be possible to redirect an approaching asteroid using spacecraft gravity. Instead of hitting a striker into an approaching object, a gravity tractor flew alongside the asteroid for a long period of time (years to decades) and pulled it slowly out of the dirt road.