Astronomers have discovered what they think may be an interstellar object passing through the solar system. At twice as wide as Mount Everest is tall, A11pl3Z (now called 3I/ATLAS and C/2025 N1) would ...
Comet 3I/ATLAS, the third interstellar object ever detected, reached its closest point to Earth overnight from Thursday to Friday (Dec. 18 to 19), and it remains in a good viewing position tonight.
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