The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Learn about the new perspective on Earth's reduction of moderately volatile elements, a discovery made possible by meteorites ...

NASA has been monitoring a never-before-seen planet in its solar system, which is eight times the size of Earth. The ...

THE search for alien life across our Solar System and beyond has so far kicked up nothing intelligent – let alone microbial.

Mercury takes only 88 Earth days to orbit the sun.

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

New research reveals that Earth and Mars lost essential elements due to violent cosmic collisions, not early planetary formation processes ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Although the chances of impact are slim, Bennu is still one of the most potentially hazardous known asteroids in our solar ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...