Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

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

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

AROOSTOOK COUNTY, Maine (WAGM) - Aroostook County’s iconic Maine Solar System Model is about to get even bigger. Two new ...

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

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

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

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

French clean-tech company HelioRec has reached a significant certification milestone for its near-shore floating solar system ...

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