Harvard scientist Loeb says comet-like 3I/ATLAS is far larger than expected and could offer clues about alien technology.

A new study has attempted to pin down the properties of interstellar comet 3I/Atlas, finding it is "anomalously massive" at around 33 billion tons.

The motion of 3I/ATLAS that helped trace its trajectory revealed a non-gravitational acceleration, which revealed the size of ...

NASA is tracking a mysterious, fast-moving object entering our solar system, raising questions about whether it's just a comet — or possibly something more advanced. The object, known as 3I-ATLAS, was ...

Space and time seem like two completely different ideas, but Einstein showed they are interlinked in what is known as ...

A striking new image of the strange interstellar object 3I/ATLAS has revealed it is growing a tail, offering more proof that ...

A fiery streak of space debris lit up the Northern California sky Thursday night, drawing hundreds of reports from residents across the Sacramento area, the Bay Area and beyond.

DARC is designed to track multiple small moving objects in geosynchronous orbit — all around the globe, 24 hours a day. A powerful new radar system designed to detect and track objects in distant ...

WASHINGTON — Defense technology company Anduril and space transportation startup Impulse Space are preparing to demonstrate ...

Daniel W.E. Green at the Central Bureau for Astronomical Telegrams, suggests that comet SWAN will hover near magnitude of +6, ...