Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

This strange object near the solar system's edge may be a rare example of the 3-body problem in our own cosmic neighborhood.

NASA has confirmed the discovery of a mysterious new planet beyond Neptune, shaking up our understanding of the outer reaches ...

Experts analyzed satellite imagery of planetary surface cracks and compared them with Earth's geologic features, searching ...

A celestial body is any natural object outside Earth’s atmosphere. This includes stars, planets, moons, asteroids, comets, dwarf planets and meteoroids. The least spherical star known is VFTS ...

A rare grouping of 10 celestial bodies is captured in a stunning new photo taken during last weekend’s great planetary parade. A rare grouping of 10 celestial bodies is captured in a stunning ...

A ring or sphere could, apparently, be stable if surrounded by the right sizes and gravities of other stars.

While parts of the Earth saw a total lunar eclipse, the Blue Ghost lunar lander captured stunning imagery of a solar eclipse on Friday. See the rare view here.

NASA's Mars Reconnaissance Orbiter caught most of a dust devil plume in this 2008 image. The HiRise camera team said, "We got ...

known as the Altjira system, is actually made up of three separate bodies orbiting one another in a complex triad. This rare orbital configuration is often referred to as the "three-body problem." ...