Comet to approach Earth for first time since Neanderthals lived

The comet, which will not return for another 50,000 years, should be visible with the naked eye in February.

A comet that only orbits the sun once every 50,000 years is expected to be visible from Earth with the naked eye. The last time the comet visited, the Sahara desert was wet and fertile, Neanderthals and woolly mammoths still walked the Earth, and humans were—as far as we know—yet to reach North America.

Comets are"cosmic snowballs" made up of frozen gases, dust and rock that orbit the sun. As they approach our star, these fragile constructs are blasted with increasing amounts of radiation, a process that can produce two vast tails of gas and dust. Predicting the brightness of comets with accuracy is very challenging. But current data indicates that C/2022 E3 is expected to reach at least magnitude +6 by around the time of its close approach to Earth.

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