On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just ...

Scientists have discovered a rogue planet roaming the Milky Way after combining observations from Earth and a space telescope ...

Choose your fighter for the origin of water on Earth! Was it always here or did it come to this planet from somewhere else in ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...

Scientists measured mass and distance of free floating planet drifting through space without star for first time.

Astronomers just measured the mass of a free-floating planet without a star for the first time ...

In doing so, they found this orphan is within the same weight class as Saturn, strengthening the case that the galaxy teems ...

Astronomers have finally weighed a wandering “rogue” planet, uncovering a Saturn-mass world flung into the galaxy after a dramatic planetary breakup.

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

Most planets are part of a star system of their own – but some go their own way, and they have remained largely mysterious ...

Most planet-forming disks have warps that can lead to planets on inclined orbits, which could explain where the tilt of Earth's orbit came from. When you purchase through links on our site, we may ...

New images from NASA 's Hubble Space Telescope have revealed an enormous, oddly shaped disk of gas and dust around a single ...