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NASA: A "dangerous" asteroid, larger than the St. Paul's Cathedral, went to Earth



A giant asteroid, larger than one of Britain's most famous landmarks, is approaching our planet.

The huge space rocket is called NF23 in 2016 and hits Earth at a speed of more than 20,000 miles an hour, 15 times faster than Concorde.

NASA believes the object is up to 160 meters wide, meaning it could be larger than St. Paul's Cathedral, which is 111 meters high and was the tallest building in London until 1967.

It will fly past some 3 million miles on August 29th and is large enough to be considered "potentially dangerous".

Artist image of an asteroid orbiting the earth [19659007] If the rock hit the earth, it would destroy an entire city and kill millions.

Luckily it's not on a collision course with our planet, so we will not meet.

Mankind does not need to fear a gigantic asteroid big enough to wipe us off the facade Because of its enormous size, they are easy to track.

But we should be terrified of smaller "stealth asteroids" large enough to wipe out a city and extremely hard to spot.

The European Space Agency believes that astronomers have discovered only 1 out of 100 space rocks that are 1 km wide or less.

St. Paul's Cathedral is one of the most famous buildings in the world (Image: PA)
Small asteroids are much harder to spot and track than large ones

Nasa figures show that to date about 4,300 space rocks have been sighted between 100 meters and 1 kilometer.

If the predictions of the ESA are correct, it could mean that there are actually 430,000 asteroids and we have no idea where most of them are or are on a collision course with our planet.

Detlef Koschny, head of the ESA Near-Earth Property Team, said even small objects could do a great deal of damage.

"If a 100 asteroids hit the earth, it would cause considerable damage in an area the size of Germany and even in the surrounding area. But asteroids of this size do not hit the earth very often. Maybe an average of every 10,000 years, "he told Space Daily.

A look at the devastation caused by the Tunguska explosion

The frequency of strikes rises from 100 meters to 50 meters at once every 1000 years In 1908, a 40 meter long object hit Earth over Tunguska in Siberia, destroying a forest area about the size of the Munich metropolitan area.

& # 39; And then, when we go to asteroid sizes of about 20 meters – like the asteroid, the In 2013 in Russia over Chelyabinsk exploded and injured 1,500 people – they appear on average every 10 to 100 years and we will definitely see something like that again in our lives. "

Earlier this year, Nasa warned of" vulnerability "of the defenses of the Earth, which means that there is a limited chance of discovering asteroids from space in a particular direction

Koschny supported this warning and said smaller objects are often only discovered when they pass the moon.

If a large asteroid was discovered so late, it might not give governments enough time to evacuate cities in the line of fire.

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