Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

FLAGSTAFF, Az. – Whether Pluto is officially a planet is the least interesting thing about the runt of the solar system, astronomers will tell you 95 years after the discovery of the fascinating ...

But a far more dramatic view has arisen in the past decade ... The first clue came from Pluto. The oddball of the solar system, it dips far above and below the pancake-like plane in which the ...

And if you are still a Pluto-is-a-planet holdout ... is simple and straightforward and has the ring of truth: the solar system is full of bodies, and some are large, and some are small.

After passing Pluto, the craft will continue into the farthest reaches of the solar system. Scientists suspect there may be yet more moons around Pluto, some perhaps sharing or swapping orbits and ...

Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth with an equatorial diameter of 88,846 ...

If all goes well, we’ll see Pluto’s mysterious surface in unprecedented detail and learn new secrets about other alien worlds at the far limits of our solar system. National Corporate funding ...

The last thing, perhaps, astronomers expected to find was a six-mile deep canyon at the edge of the Solar System. But on Charon, Pluto's nearest moon, they found this most familiar of geological ...