NASA has discovered an interstellar comet that's wandered into our backyard. The space agency spotted the object with the sky ...

An object from another star has been seen entering the solar system at high speed, and is expected to whip around the sun in ...

The object gained an official name, C/2025 N1 or 3I/ATLAS, on Wednesday. Moving at a record-setting speed for an interstellar ...

Beginning in the 1960s, satellite instruments have measured Earth's reflected broadband shortwave radiation and emitted ...