Interstellar objects move too fast and arrive too rarely for astronomy to rely on a single instrument or a single kind of light. When comet 3I/ATLAS was first reported on July 1, 2025, observatories ...

A cosmic traveler from beyond our solar system is making its closest approach to Earth this week, offering astronomers and stargazers a fleeting opportunity to witness a visitor from another star ...

When the interstellar comet 3I/ATLAS swept through the inner solar system in Dec, it offered Earth a rare glimpse of material forged in another star’s neighborhood and turned a niche astronomical ...