Astronomers may have demoted Pluto from full-fledged planet to dwarf status, but evidence suggests the solar system may still ...

The planets in our solar system, varied as they are, represent only a minuscule part of a large, broad spectrum of planetary scale and temperature," he said.

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 discovery of the first exoplanet (a planet outside of our solar system), was made in 1995 and astronomers have discovered more than 4,000 others since then.

A Jupiter-like planet has been found orbiting a young sun-like star in a solar system far away in what is a potentially ...

If you're trying to get a beautiful look at the planets in our solar system, you're in luck.

Recent research suggests a warp in the orbital plane of Trans-Neptunian Objects (TNOs) between 80 and 400 AU, hinting at the gravitational influence o ...

A hypothetical Kuiper Belt Planet in the outer solar system could help explain the orbits of trans-Neptunian objects.

When it comes to real planets—bodies with enough mass to achieve a nearly round shape, clear nearby debris, and orbit the sun—we know of only eight in our solar system.

Today, they’re seen as totally plausible categories in the study of thousands of planets beyond our solar system.