Astronomers have long been intrigued by the makeup of the asteroid belt’s largest body. When it was first spotted in 1801, ...

Sculpture outside the Reach museum in Richland Bob Brawdy bbrawdy@tricityherald.com Saturn is at the USS Triton Sail in north ... approval for the beloved dwarf planet. All told so far, at least ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

At the very edge of our solar system, beyond the grasp of Neptune and even past the icy sprawl of Pluto’s domain, a new ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, along with dwarf planets like ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar ...

This exoplanet, which is roughly six times the mass of Jupiter (making it a "super-Jupiter"), was the first transiting planet known to orbit a white dwarf (WD) star. In a recent paper, an ...

Pluto was officially reclassified from a planet to a dwarf planet by the International Astronomical Union (IAU) in August 2006. While Pluto orbits the Sun and is large enough to be spherical due ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...