An huge volcanic comet, 12P/Pons-Brooks, has violently exploded for the second time in four months and it is heading towards the Earth. It will not hit the Earth but we could see it in the night sky around April 21, 2024.
It has a solid nucleus, with an estimated diameter of 18.6 miles (30 kilometers), and is filled with a mix of ice, dust and gas known as cryomagma. The comet is about three times bigger than Mount Everest. The asteroid that killed the dinosaurs was between 10 and 15 kilometers wide.
12P is currently hurtling toward the inner solar system, where it will be slingshotted around the sun on its highly elliptical 71-year orbit around the sun.
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