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.

Something unusual is moving through our solar system —a fast, faint object now confirmed to have originated beyond it.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed. The object -- likely a comet -- was first detected in data collected between by ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

NASA scientists have confirmed that a mysterious object shooting toward us through the solar system is an "interstellar object" — only the third of its kind ever seen.

3I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the galaxy.

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...

A Gigantic Megacomet Is Erupting as It Zooms through the Solar System Recent observations have revealed carbon monoxide venting from the largest comet ever seen, providing clues about its origins ...

This Powerful Telescope Quickly Found 2,100 New Asteroids The Vera C. Rubin Observatory is expected to find millions of unknown objects in our solar system, and perhaps even a mysterious Planet Nine.

The Last Time NASA's Voyager "Looked Back" At Our Solar System, This Is What It Saw Before it met the 30,000-50,000 kelvin wall at the edge of our Solar System, Voyager 1 took its final images.

By using a more complete solar system model, Zeebe and Hernandez showed that stellar flybys are not likely behind Earth's dramatic paleoclimate shifts, like the PETM.