When you buy through links on our articles, Future and its syndication partners may earn a commission. More than 80 observers have signed up to track comet 3I/ATLAS (seen here) as part of the U.N.'s ...

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.

When 3I/ATLAS swept past the sun in late October 2025, it became only the third confirmed visitor from interstellar space ...

A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro Pachón in Chile, one half of the International Gemini Observatory and ...

3I/ATLAS, an interstellar object identified by NASA as a comet, recently passed its closest point to the sun. Scientists around the world are observing its months-long journey to learn more about the ...

Comet 3I/ATLAS has arrived in the inner solar system behaving as if the usual rules of comet physics were optional. Instead ...

Eager skywatchers will soon have front-row seats to a rare cosmic encounter as interstellar comet 3I/ATLAS makes its closest approach to Earth, and you can watch it happen live online tonight! The ...

Comet G3 is on its first voyage into the inner solar system, meaning it’s packed with volatile materials that have never been exposed to the Sun’s warmth before. This makes its behavior somewhat ...

Comet C/2025 R3 (PanSTARRS) is already being talked about as the sky spectacle to watch in 2026, with some wondering if it might rise to the rare status of a “great comet.” The object is on track to ...

This spring, skywatchers have been treated to the captivating and unpredictable display of a new comet, called C/2025 F2 (SWAN). Discovered in late March 2025 through data from the SWAN instrument ...