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

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same ...

The star is surrounded by a protoplanetary disk, and this disk is the first evidence of debris condensing into what will ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

The astronomers observed hot minerals just beginning to solidify – the first specks of planet-forming material, the ...

Such is the case with 3I/ATLAS, a third known interstellar object from outside of our solar system to be discovered, which was spotted by NASA’s ATLAS (Asteroid Terrestrial-impact Last Alert System) ...

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

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and meteoroids. The exact boundaries of the solar system ar ...

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

CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby ...

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it ...