3I/ATLAS is now exiting our solar system at more than 137,000 miles per hour.

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA's Jupiter Icy Moons Explorer ...

The probe launched almost 50 years ago and is the farthest human-made object from Earth. Shutting down one of its scientific devices will help it conserve energy and continue traveling toward the edge ...

Astronomers found 'heavy water' in interstellar comet 3I/ATLAS, suggesting it formed in a cold, unusual environment beyond ...

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The farthest spacecraft from Earth has shut down another instrument in the hopes of buying time for an upgrade that could boost the aging probe’s impressive lifespan.

The LECP has been operating almost without interruption since the Voyager 1 and 2 probes launched in 1977. Meanwhile, the ...