Four asteroids heading towards Earth will come close to colliding with planet on Wednesday while travelling at 8 miles per second
One expert said: "I don't remember that this has ever happened before."

FOUR asteroids will come close to colliding with Earth on Wednesday, with scientists warning that they could have the potential to "do quite some damage".
The massive objects, named 2006LH, 2010XN, 2015YQ1 and 2006XD2 are travelling close together and will thankfully miss our planet.
2006LH, the largest of the four, is travelling at 8 miles an hour and is 260 metres across - twice the height of the London Eye.
It is also the asteroid that will travel closest to Earth - missing by 1.5million miles.
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Planetary scientist Dr Detlef Koschny, co-manager of the European Space Agency's Space Situational Awareness division, told "If it were to hit it would do quite some damage.
"But none of these objects have any chance to impact the Earth, so we are safe."
How close will the asteroids comes?
2006LH will miss Earth by 1.5million miles
2010XN will miss Earth by 3.5million miles
2006XD2 will miss Earth by 4.2million miles
2015YQ1 will miss Earth by 4.5million miles
While many of Near-Earth Asteroids come within just under 6million miles of Earth each month, it is very rare for four to all pass on the same day.
Dr Koschny added: "This is very rare. I don't remember that this has ever happened before."
Last month we revealed that a plan to save Earth from the threat of a giant asteroid is being tested by NASA.
The project aims to alter the potentially catastrophic path of a boulder, redirecting the asteroid towards the moon should it come too close to earth.
The Asteroid Redirect Mission also aims at taking materials off the asteroid for future research.
The system could be ready in the next five years.
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