The Sun is an incandescent but benevolent dictator. For billions of years, it's kept our Solar System well organized and ...

Beyond Neptune lies the Kuiper Belt, a vast region of icy bodies offering crucial insights into the solar system’s formation.

The moderate tilts and slightly elongated paths of these planets — long considered a mystery — could be the result of a ...

The solar system is approximately 4.6 billion years old. Astronomers believe that roughly 100 million years into its existence, the planets first ... two to 50 times the mass of Jupiter flew ...

Called Kepler-51, the Sun-like yellow dwarf star was found in 2012 to have three exoplanets in its orbit; each, it would turn ...

New observations show that newly formed planets close to a star help shepherd dust and gas to create more planets farther out ...

Massive object passing through solar system is a better explanation for nature of orbits of Jupiter, Saturn and Neptune ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars.

or "planet X." Indeed, the solar system as we know it doesn't quite make sense without it. All objects in the solar system orbit the Sun. Some move quickly, others slowly, but all obey the laws of ...

But the formation process of multi-planet systems, like our own Solar System, is still poorly understood. The best example object to study multi-planet system formation is a young star known as ...

The research team's simulations indicate a 1 in 100 chance that an interstellar visitor could produce the orbits we see today ...