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 ...

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

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 ...

"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.

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

Astronomers first identified these minerals using the now-three-year-old James Webb Space Telescope. To see where exactly the ...

Harvard astronomer Avi Loeb suggests that if interstellar object 3I/ATLAS isn't a comet, nor an asteroid, it may have been ...