The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an ...

PLANET MAKER. In this artwork showing the early solar system, an enormous dust disk stretches around the Sun and serves as a breeding ground for new planets as material clumps together.

The origin of the differing tilts in the orbits of the planets in our solar system may have been revealed through the ...

A new trans-Neptunian object, 2017 OF201, has been found with a vast orbit and potential dwarf planet size. The finding hints ...

From the scorching surface of Mercury to the icy edges of Neptune, our planetary neighborhood is full of wonders. The order of the planets isn’t just trivia—it tells a story about temperature, ...

According to a new proposal, the solar system has 12 planets instead of the familiar 9, with several dozen more to come.

The planets astronomers see often around other stars are strangely absent from our own solar system. We’re still figuring out why.

Astronomers have directly spotted a rare young planet, WISPIT 2b, still forming within the gap of a dusty ringed disk around ...

Go look at The Planets Today. Notice anything strange? The planets are all on one side of the Solar System, with Earth somewhere in the “middle” of the cluster. While this is normal, natural ...

This solar system of seven Earth-sized planets may be the best place to look for alien life Many of the planets have the right temperatures needed for hosting liquid water ...

The smallest and largest planets that form our solar system range incredibly in temperature, composition, geology, and of course size.