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

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

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

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

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

The Solar System, home to Earth and countless other fascinating planets and moons, exists within the Milky Way galaxy. But ...

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

"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.

Comet 3I/ATLAS was first identified by the Asteroid Terrestrial-impact Last Alert System (ATLAS), a global network of four ...

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

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