The newly discovered world — a "sednoid" — challenges what planetary scientists thought they knew about the edge of the solar ...

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

There’s a visitor in town, and its name is 3I/ATLAS. The presumed interstellar comet presents a rare opportunity for ...

Scientists have spotted a mysterious object flying through our Solar System. A new paper suggests it might be an alien ...

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

Astronomers have discovered the earliest seeds of planets forming around HOPS-315, a baby star located 1,300 light-years away ...

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

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 ...

Astronomers witness first moments of planet formation as rock grains crystallize around distant star HOPS-315.

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

The researchers used the James Webb Space Telescope to probe the chemical make-up of material around the star, and found the ...

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