Pluto TV is teaming up with CBS to launch what it deems its largest-ever full-season promotional preview campaign. Starting ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

Two Caltech astronomers using an aging telescope to scan the fringes of the solar system have found an object half the size of Pluto--a distant, icy sphere they have dubbed Quaoar. The scientists say ...

LAUREL, Md. — With less than a day to go before NASA's New Horizons mission zooms past Pluto, scientists reported on Monday that the dwarf planet isn't quite as dwarfish as they thought — in fact, ...

Normally when a medium-size star dies, it blasts away the bulk of material in its system. The Hubble discovery was surprising ...

First, let’s compare the orbital characteristics of Pluto with those of other planets. Pluto has an orbital eccentricity (the degree to which its orbit deviates from a perfect circle) of 0.25, while ...