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 ...

Images from two different telescopes give astronomers a glimpse at the formation of a "new" planetary system around a star ...

The meteorite Northwest Africa (NWA) 12264 might cause changes to the timeline of planet formation, affecting the knowledge ...

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

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 ...

The answers to those questions depend on how we define the death of the solar system.

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