Miguel Claro took one last look at the comet as it bid farewell to Earth for the next 80,000 years.

Most comets, including the well-known Halley's, loop through our solar system like cosmic time capsules that formed alongside ...

Comet 3I/ATLAS is expected to make its closest pass by the Sun on Oct. 30, when it will fly 130 million miles inside the ...

New findings about interstellar comet 3I/ATLAS reveal its surprising size, possible thick disk origin, and what makes it unlike any other ISO ...

NASA scientists have discovered a rare visitor from beyond our solar system, a new interstellar comet speeding by on a brief cosmic tour.

Astronomers have spotted a new comet, moving on a trajectory that indicates that it whizzed into our solar system from interstellar space and is just passing through.

WASHINGTON, July 3 >> Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object has been observed visiting our solar system.

The space agency spotted the quick-moving object with the sky-surveying Atlas telescope in Chile earlier this week and confirmed it was a comet from another star system.

NASA has discovered an interstellar comet that's wandered into our backyard. The space agency spotted the object with the Atlas telescope in Chile earlier this week, and has confirmed it was a comet ...

Astronomers have spotted a new comet, moving on a trajectory that indicates that it whizzed into our solar system from interstellar space and is just passing through. It's only the third time ...

It will make its closest approach to the Sun in October. Astronomers have spotted a new comet, moving on a trajectory that indicates that it whizzed into our solar system from interstellar space and ...