Nearly a month ago, a mysterious object was seen hurtling through the solar system and later confirmed as an interstellar ...

A lone body, making one passage around the Sun for every ten by Neptune, is rewriting the rules of planetary dynamics in the ...

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and ...

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 ...

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

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

A newly found icy object, Ammonite, may be a 4-billion-year-old fossil from the Solar System’s edge—and it’s casting doubt on ...

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

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

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