While almost everyone knows about Pluto being a dwarf planet, many are not aware that there are five others in our solar ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

As the gatekeepers to the Kuiper Belt, Charon and Pluto are a unique double dwarf planet system ... Christy had been imaging Pluto with the USNO's 1.5-meter (4.9-foot) telescope.

5 (UPI) --On this date in history ... It was considered the largest known dwarf planet in the solar system until a year later when Pluto was downgraded from being a planet. In 2008, tribal ...

The eight planets travel around the Sun at different speeds. These lines show us the paths they take which we call orbits. On a clear night from Earth we can sometimes see the five planets which ...

The organic material found in a few areas on the surface of dwarf planet Ceres is probably of exogenic origin. Impacting asteroids from the outer asteroid belt may have brought it with them. In the ...