Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

KQ14, nicknamed "Ammonite", was discovered using the Subaru Telescope and is a highly elliptical object with a perihelion and ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one day resemble our own.

A mysterious object the size of Manhattan, originating from outside our Solar System, has been spotted by astronomers. Experts have confirmed the discovery of this rare interstellar visitor—only ...

Watch interstellar comet 3I/ATLAS live online tonight as it races toward the sun on a rare visit from beyond our solar system.

When most people think of our Solar System, they think of the 8 planets officially recognized by the International Astronomical Union (IAU). But what if I told you there are at least 40 planets, and ...

Astronomers have confirmed that a rare intersteller object is zooming through the solar system. This is only the third time this has been recorded.

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show.

PARIS – Astronomers have confirmed the discovery of an interstellar object racing through our solar system – only the third ever spotted, though scientists suspect many more may slip past ...

CAPE CANAVERAL, Fla. (AP) — Astronomers are monitoring an object headed our way that may have wandered over from another star system.

A new celestial object has been uncovered on the edge of our solar system, revealing another piece of the vast puzzle that is our cosmic neighborhood. Discovered using the Subaru Telescope at Mauna ...