Comet 3I/ATLAS—the third interstellar object ever known to pass through our solar system—is accelerating and now approaching its closest point to Earth. “Significant” non-gravitational accelerations ...

Weeks after a rare interstellar comet made its closest pass to the sun, it will make it’s closest pass to Earth. The comet has traveled billions of miles through other systems in space. Its orbit is ...

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Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

The interstellar comet will pass safely by Earth, giving astronomers their best chance to study it up close. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

New images taken with the Gemini North telescope in Hawaii confirm that the interstellar comet 3I/ATLAS has gotten brighter and greener since its close flyby of the sun in October. When you purchase ...

The most sensational story of the year for astronomers has been the discovery of the comet 3I/ATLAS, which was first observed on July 1, 2025 by NASA's Asteroid Terrestrial-impact Last Alert System ...

Interstellar comet 3I/ATLAS made its closest approach to Earth on Friday, Dec. 19. The comet will pass within about 170 million miles of our planet and poses no danger. While not visible to the naked ...

Scientists used the Gemini North telescope in Hawaii to obtain images of the third-ever detected interstellar object, Comet 3I/ATLAS, on Nov. 26, 2025. Credit: NSF NOIRLab In the spirit of the season, ...

The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) aboard NASA's Europa Clipper spacecraft has made valuable observations of the interstellar comet 3I/ATLAS, which in July became the ...