The long, puzzling dwarf planet Ceres, in reality the first named asteroid, has surface features that are much more complex ...

Astronomers have discovered the first evidence that tiny red dwarf stars can devour their own planets.

Somewhere between 50 and 200 million years ago, in three stellar nurseries not far from our corner of the Milky Way, at least ...

A young red dwarf can look calm from a distance. But buried in its light may be the chemical remains of a wrecked world.

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Our solar system is much like a trail of microcosmic breadcrumbs: Follow the molecular bits as far back as they go, and you'll learn a thing or two about where many of our planets and other celestial ...

Scientists with the Institute for Advanced Study’s School of Natural Sciences say they have found a possible dwarf planet that they have dubbed an "extreme cousin" of Pluto. They say that the possible ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for being a planet, putting Pluto into the new category of dwarf planet ...

WASHINGTON >> Scientists have identified an object about 435 miles wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a ...

Astronomers have found some of the strongest evidence yet that stars can swallow their own planets. A new study, published in ...

A rare type of plutonium has been found in the crust below the deep sea, offering new clues as to how heavy metals form in star explosions and mergers. Strange hexagonal diamonds may have been ...