![]() ![]() Larger asteroids strike even less frequently. Rocks the size of the Chelyabinsk meteor - roughly 66 feet (20 meters) wide - breach Earth's atmosphere once every 50 to 100 years, according to an estimate from the European Space Agency ( ESA). Arriving from the direction of the sun, the rock remained hidden in our biggest blind spot, until it was too late.Įvents like these are, fortunately, uncommon. Yet no observatory on Earth saw it coming. The Chelyabinsk meteor is thought to be the biggest natural space object to enter Earth's atmosphere in more than 100 years. The blast shattered windows on more than 7,000 buildings, temporarily blinded pedestrians, inflicted instantaneous ultraviolet burns and otherwise injured more than 1,600 people. Briefly glowing brighter than the sun itself, the meteor exploded with 30 times more energy than the bomb that destroyed Hiroshima, exploding some 14 miles (22 kilometers) above the ground. 15, 2013, a meteor the size of a semitrailer shot out from the direction of the rising sun and exploded in a fireball over the city of Chelyabinsk, Russia.
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