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

Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a ...

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.

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

The Subaru Telescope has made an exciting discovery: a small body beyond Pluto, with implications for the formation, evolution, and current structure of the outer solar system.

The astronomers observed hot minerals just beginning to solidify – the first specks of planet-forming material, the astronomers said. A gaseous disk surrounding the young star is the first stages of ...

Deep in space, astronomers have witnessed a rare and powerful moment: the birth of planets around a distant baby star. This ...

Astronomers have hoped for the existence of Planet Nine for years. Things were looking promising, but this discovery might ...