Though the dwarf planet Eris on the edge of the solar system is much denser than Pluto, the two frigid worlds are nearly exactly the same size, a new study finds. Astronomers accurately measured Eris' ...

WASHINGTON (Reuters) - Dwarf planet Eris, similar in size to its better-known cosmic cousin Pluto, has remained an enigma since being discovered in 2005 lurking in the solar system's far reaches.

University of California, Santa Cruz Professor of Planetary Sciences Francis Nimmo recently co-authored a Science Advances paper about the internal structure of the dwarf planet Eris. Eris is about ...

The frozen surface of the dwarf planet Eris looks a lot like that of its smaller neighbor Pluto, new research has found. Both frozen worlds are covered predominantly with nitrogen ice, a research team ...

Three notable celestial bodies are seen as lit crescents, one in the foreground takes up half the image, the second is much smaller at the top, with a shining third near the bottom right as the first ...

PASADENA, Calif.–Die-hard Pluto fans still seeking redemption for their demoted planet have cause for despair this week. New data shows that the dwarf planet Eris is 27 percent more massive than Pluto ...

Jan. 5 (UPI) --On this date in history: In 1914, the Ford Motor Co. increased its pay from $2.34 for a 9-hour day to $5 for 8 hours of work. It was a radical move in an attempt to better retain ...

If Pluto’s looking for someone — or something — to blame for being drummed out of the planetary corps back in 2006, it need look no further than Eris. The solar system’s ninth planet had long had its ...

Uncrowned is a new destination for all things MMA, boxing, wrestling, and more, featuring Ariel Helwani. Yahoo Racing is powered by Motorsport Network, providing expert reporting, analysis, and ...