One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

With discoveries about Pluto from NASA’s New Horizons mission rolling in, here are nine of the most interesting facts about the former planet. 1. Pluto was first discovered by a young research ...

After nine years of travelling, and a three billion mile journey, the New Horizons probe is getting close to its fly-by of Pluto. It's hoped it will take the clearest pictures ever of the surface ...

Pluto's orbit: Quick facts Pluto's rotation is retrograde compared to the solar systems' other worlds; it spins backward, from east to west. Average distance from the sun: 3,670,050,000 miles ...

Pluto is situated in the Kuiper Belt, a region beyond Neptune. Its distance from Earth varies from about 4.67 to 7.4 billion miles.

Pluto is the largest of that class of planet ... though scientists are chipping away at the unknowns. Here are a few things they know—but you might not—about Makemake. 1.

Here are the five most surprising things discovered by the deep-space instrument. After almost a decade in space, the New Horizons probe's close encounter with Pluto lasted just six days as it ...

"Now, that's no kind of behavior for a planet. What is that about? It's one of the odd things about Pluto that no other planet shares. "I think Pluto is happier" in its current classification ...