Explore Pluto's reclassification as a dwarf planet and how Eris's size advantage challenges old beliefs about planetary status. Images taken in December 2005 by Brown and others with the Hubble Space ...

Washington, May 19 (PTI) Scientists have discovered a new moon orbiting the third largest dwarf planet, that resides in the frigid outskirts in our solar system. With this discovery, most of the known ...

Add Yahoo as a preferred source to see more of our stories on Google. On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just ...

Add Yahoo as a preferred source to see more of our stories on Google. Astronomers discover potential dwarf planet 2017 OF201 beyond Neptune. (photo credit: Sihao Cheng et al) The researchers said 2017 ...

Anyone who grew up learning that our solar system has nine planets probably remembers the moment Pluto got demoted. That decision back in 2006 wasn't just paperwork. It came from a real, testable set ...

Researchers used a clear-filter mosaic to make this colorized global map of Ceres. The map had color added using spectral data from other observations of Ceres (calculated using a color transformation ...

The “second-generation” world, predicted from telescope data, could be the first known planet of its kind, and it may shed ...

Could Ceres have been habitable? NASA said this week that the dwarf planet Ceres – largest body in the asteroid belt between Mars and Jupiter – might once have had a lasting source of chemical energy.

WASHINGTON, May 30 (Reuters) - Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting ...