Everyone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...

it’s understandable that the IAU faced criticism from the public for redefining a "planet" in such a way that seemed almost ...

much as Ceres had seemed before the other asteroids were discovered. But then, starting in 1995, astronomers with better instruments began to find Pluto's nearby relatives. Soon, they had ...

They got kicked out soon, but then when we started being able to see asteroids, Ceres, Vesta ... And if you are still a Pluto-is-a-planet holdout, like we were, [Michael]’s argument that ...

It is second in size only to asteroid Ceres, which is 580 miles (940 km ... Several, including EB173, are much larger. Pluto was discovered by Clyde Tombaugh in 1930. Many astronomers believe ...

Pluto is too far away from Earth to be seen with the naked eye. If you stood on Pluto's surface, the Sun would merely appear to be a very bright star. Although previous images showed that ...