Pluto has five moons.

20th century In the 20th century, Pluto was discovered.

Where are they? There's something called the Kuiper belt, which some people think Pluto's not a planet, that's where Pluto is, it's in the Kuiper belt.

This is much like Pluto, except that it is constrained to always be in the opposite phase of its orbit from Pluto Orcus is at aphelion when Pluto is at perihelion and vice versa.

But if you live in a vacuum, if you live on the surface of one of these objects, say, in the Kuiper Belt, this an object like Pluto, or one of the smaller objects in the neighborhood of Pluto, and you happened if you're living on the surface there, and you get knocked off the surface by a collision, then it doesn't change anything all that much.

Pluto was considered to be an outer planet from its discovery in 1930 until its reclassification as a dwarf planet in 2006 (see also Kuiper belt).

The eight planets of the Solar System all lie very close to the ecliptic comets and Kuiper belt objects like Pluto are at far more extreme angles to it.

It is the largest moon in the Solar System relative to the size of its planet, though Charon is larger relative to the dwarf planet Pluto, at 1 9 Pluto's mass.

On the other hand, the high density of , 2.6 3.3 g cm3, suggests a very high non ice content (compare with Pluto's density 2.0 g cm3).

Its largest moon Charon, named after the ferryman who took souls across the River Styx, is more than half as large as Pluto itself, and large enough to orbit a point outside Pluto's surface.

And in those 50 years, not only did we literally, physically set foot on the moon, but we have dispatched robotic spacecraft to all the planets all eight of them and we have landed on asteroids, we have rendezvoused with comets, and, at this point in time, we have a spacecraft on its way to Pluto, the body formerly known as a planet.