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3I/ATLAS to Make Its Closest Approach to Earth in December. Here's the Latest

3I/ATLAS will pass about 170 million miles from Earth on Dec. 19 and can be observed with small telescopes until spring 2026, NASA said.

  • On Dec. 19, 3I/ATLAS will make its closest approach to Earth, passing about 170 million miles away and posing no threat.
  • Originating beyond our solar system, 3I/ATLAS follows a hyperbolic trajectory and travels at about 137,000 miles per hour, confirming it was ejected from another star system.
  • Imaging from space telescopes and spacecraft provided the data used for size estimates, with the Hubble Space Telescope indicating the nucleus measures between about 1,400 feet and 3.5 miles, and NASA releasing images on Nov. 19.
  • Using a small telescope, observers can spot the comet in the pre-dawn sky through spring 2026, giving professional and amateur astronomers a rare chance to study ancient material from another star.
  • NASA officials have publicly pushed back on claims the object is extraterrestrial technology, with Sean Duffy stating `No aliens. No threat to life here on Earth.` and Avi Loeb calling it `most likely a comet of natural origin`.
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11 Articles

Florida TodayFlorida Today
+3 Reposted by 3 other sources
Center

Where is 3I/ATLAS now? When, how to see interstellar comet in December

December is the month that fans of 3I/ATLAS have been waiting for as the interstellar comet makes its closest approach to Earth.

·Brevard County, United States
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Lean Right

He probably flew around when our solar system did not exist yet: Comet 3I/Atlas is an unusual guest – and especially close to the Earth in December. What distinguishes him from other chunks from the depths of space – and when you see him.

·Dortmund, Germany
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Photo: Courtesy The scientific community is waiting, comet 3I/Atlas will pass. near the earth, can be observed by both professional and amateur teams and here we will tell you all the details about how you can contemplate it and what day will this expected interstellar event be. How to see comet 3/I Atlas from Mexico? The night sky will surprise the observers again this month with the passage of comet 3/I Atlas, a rare visitor whose trajectory w…

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rpp.pe broke the news in on Monday, December 1, 2025.
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