Story perspectives

New Images Reveal Unique Interstellar Comet 3I/ATLAS

9/21/2025

Summary

Story summary

Michigan State University scientists unveiled new images of interstellar object 3I/ATLAS, highlighting its unique origins.
As the third detected interstellar comet, 3I/ATLAS exhibits unusual activity by emitting gases far from the Sun.
Researchers identified the object in TESS images from May to June, prior to its official discovery in July.
Its chemical composition may differ from typical comets, possibly containing carbon monoxide and other materials.
3I/ATLAS will make its closest approach to Earth on December 17, 2025, at about 223 million miles away.

History

Historical Context

In 1986, NASA's Halley's Comet mission advanced our understanding of comets, revealing their icy and dusty composition. This legacy continues with the discovery of 3I/ATLAS, an interstellar comet expected to reach its closest approach in 2025. Its unique chemical properties suggest diverse origins, enhancing our knowledge of interstellar objects and their formation in the cosmos.

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Story summary

Michigan State University scientists unveiled new images of interstellar object 3I/ATLAS, highlighting its unique origins.
As the third detected interstellar comet, 3I/ATLAS exhibits unusual activity by emitting gases far from the Sun.
Researchers identified the object in TESS images from May to June, prior to its official discovery in July.
Its chemical composition may differ from typical comets, possibly containing carbon monoxide and other materials.
3I/ATLAS will make its closest approach to Earth on December 17, 2025, at about 223 million miles away.

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