Ever since an asteroid named 1998 OR2 passed ‘close’ to Earth, it has triggered one of the long-lasting arguments about space, that a solar system is filled with flying rocks that regularly knock out our planet. However, space is empty to an extent that is beyond human imagination, and irrespective of vast emptiness, collisions do occur. Seven years ago, a small asteroid injured more than 1,000 people in Chelyabinsk, Russia. Therefore, cosmic impacts are quite evident, so long as you modulate your concern to meet the true nature and magnitude of the risk.
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