At the end of last month, a space field spacecraft about the size of a field field passed our planet at the smallest margin – re 45, miles60૦ miles (, 000), 5 km) over a fifth of the Moon's distance. The asteroid, dubbed the '2019 OK', has since been classified as a "city-killer", capable of killing hundreds of thousands in principle if it struck the earth's inhabited area. While this is nothing new, the phenomenon was even more worrisome, as the rogue space bar made scientists almost unaware.
Although astronomers did discover exactly 2019 just a few days before its uncomfortably close encounter with Earth, no one knew about the planet's path and the associated narrow margin shortly before the eclipse took place.
The asteroid's & # 39; un-validation & # 39; will be used to test the fly, despite its photographs
Michael Brown, a professor of physics and astronomy at Monash University's School, told Express.com: "It was amazing Planet This big pass is very close with very little warning.
"That said, we're getting better at figuring this out Asteroids Before they get too close to uncomfortable. The 2019 OK was independently discovered by two different teams of astronomers, and the 2019 OK was in the images taken several weeks before its close approach, but unfortunately it was not identified.
"Our ability to detect this Asteroids Improvements with new software software, cameras and telescopes, including large synoptic survey telescopes
Approach to Asteroids: Exactly 2019, last month brought the earth's past "uncomfortably close"
Approach Asteroids: 2019 flew by exactly the smallest margin
"When it's not good to keep this Asteroids To sneak up on us, this reference has to be made. Asteroids This size probably hits the earth every 1,000 to 10,000 years and usually hits populated areas. There is a real risk, but as an astronomer I see climate change as a significant risk and challenge beyond the 100-meter. Asteroids"
Professor Alan Duffy of Royal Stralia called the Royal Institution, Flyby "uncomfortably close."
The planet was initially spotted by both the Scientific Optical Network (ISON) and the Southern Observatory for Near-Earth Asteroids Research (SONIER), but this slow celestial rock appeared to move only a small amount of space between the images, and was therefore not identified. General Chat Chat Lounge
"Krzysztof Steneck, a professor at Ohio State University, admits"It was quite a wake-up call. "
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He told Express.com, "The Brazilian team spotted him about 24 hours before the nearest approach.
"But because of the way this space rocks, you can't determine its orbit if you only see it once.
"The big question is that the sky is so big and we're not really monitoring it.
"We can but we can't. And this thing pulls on us.
"We knew about Flyby about a day before that was not enough to do anything.
"It was about 24 hours before the nearest approach was seen by the Brazilian team.
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Approach to Asteroids: A meteorite exploded over Chelyabinsk in 2013
"But because of the way this space rocks, you can't determine its orbit if you only see it once."
"This & # 39; un-belief & # 39; of asteroids," explains Jane, planet head of planet protection. , "Will be used to test the software going into the asteroid-hunting telescope coming from the European Space Agency (ESA).
ESA and US space agency NASA are looking for thousands of asteroids in the solar system, with many critics questioning why it was discovered so late.
However, there is currently no clear reason, other than the slow 2019 pace of the sky before approaching.
The 2019 OK also travels in a very elliptical orbit, moving beyond Venus in orbit beyond Mars.
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Asteroid 2019 OKL In this image the rogue spot is shown
This means that it spends close to Earth and is relatively short to detect with current telescope capabilities.
The cold from the impact of the land erodes the whole city while submerged in the sea can cause a tsunami that affects the lowland.
In both cases the planet will change the atmosphere for many years.
NASA estimates that it has already covered 90 percent of the Earth's earth with about 3 km. Or even more – which would have catastrophic global impacts in the event of a collision.