The way comets behave in space may seem random, but new research suggests there’s more order behind the chaos than once ...

A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

Gravity is the force that governs the structure and motion of the solar system, keeping celestial bodies together in a cosmic dance. The sun, with its immense mass, generates the strongest ...

Pluto was long considered the ninth planet of the solar system, but changes to the definition of planet got it kicked out of ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond Neptune, it orbits the sun every 25,000 years.

Slow-motion seasons unleashing massive ... similar that is to a landscape a billion miles away elsewhere in the solar system, the same processes, the same desert monsoon systems we think are ...

Our solar system may have a ninth planet after all ... Two deep infrared surveys taken 23 years apart measured the object's orbital motion. In 1983, the Infrared Astronomy Satellite surveyed ...

the point at which molecular motion stops. But this temperature is not constant throughout the solar system. So-called "empty" space — though it is not actually empty — is far colder than ...

A new Tatooine-like planet outside the solar system may orbit two failed stars ... In a new analysis, researchers found that the brown dwarfs’ motion was changing — a quirk that’s ...