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

Scientists say 3I/ATLAS, one of the rarest comets ever seen, likely isn’t alone and that more interstellar objects may soon be on the way.

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.

Ever since the comet 3I/Atlas was spotted, it has sparked curiosity—not just from astronomers and physicists, but from anyone ...

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously thought, astronomers say.

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.

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

GSSAP satellites are tasked with “neighborhood watch” surveillance in geosynchronous orbit, tracking objects and threats, but because they cannot maneuver freely or frequently without using up their ...

Several California residents reported seeing a fiery meteor-like object shooting through the sky on Thursday night. But was ...

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 ...

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