An interstellar traveler is getting closer to Earth than ever before: How to observe comet 3I/ATLAS

An ancient visitor, forged in another corner of the universe, is preparing to approach Earth. It goes by the name of comet 3I/ATLAS, and was discovered five months ago by the ATLAS telescope network in Río Hurtado, Chile. Classified as the third interstellar visitor to cross our skies, it follows the asteroid Oumuamua in 2017 and the bright comet Borisov in 2019. On December 19, this wandering celestial body will be 270 million kilometers (168 million miles) from our planet — almost twice as far away as the Sun.

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