A mystery interstellar object discovered last week is likely to be the oldest comet ever seen – possibly predating our solar system by more than three billion years, researchers say. The "water ...

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar ...

SPHEREx is scanning the entire sky in 102 infrared colors, beaming weekly data to a public archive so scientists and citizen ...

Physical Description United States Army Military Academy distinctive insignia; blue enamel shield with Greek Hoplite warrior helmet with sword handle depicted in gold.