smallest planet. Its mass (weight) is 1/500th that of the Earth. Its diameter
is about 1/6 that of our planet.
Is the ninth planet in order from the
Sun. It is about 5.9 billion kilometers from the Sun.
Makes one complete orbit around the Sun
every 248 years.
Rotates on its axis slowly when compared
to Earth. It completes one rotation in about 6 days and 9 minutes.
Is sometimes known as a double-planet
because it has a moon (Charon) that orbits it.
Has a total of 1 satellite (or moons).