How long does it take Pluto to orbit the sun? Learn more about how this planet makes one lap around our Solar System.

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

A recent study indicates a small chance that Earth could be ejected from our solar system due to passing stars. Simulations ...

JWST has confirmed Pluto’s bizarre atmospheric behavior and its ghostly interaction with Charon. These findings could reshape ...

New James Webb Space Telescope data reveal Pluto's high-altitude haze is a key driver of the climate on the dwarf planet, ...

The Voyager probes we sent from Earth back in the 70s found an incredible 'wall of fire' at the edge of our solar system ...

In the latest shutdown, the cosmic ray subsystem experiment on Voyager 1 and Voyager 2’s low-energy charged particle ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system. The object—which orbits out beyond Neptune—has been named "2017 OF201" by the ...

They were also not the first missions to carry a message intended for extraterrestrial beings should they reach interstellar ...

A field star drifting within 10,000 astronomical units may be enough. This could rattle the Oort Cloud, the icy shell at the ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Pluto was once the ninth planet ... Mercury is the smallest planet in our solar system. Mercury is a little more than one-third the width of Earth and has an equatorial diameter of about 3,032 miles ...