Is the smallest and closest to the Sun
After the Moon, it is the brightest natural object in the night sky
It is sometimes referred to as the world or the Blue Planet
Because the iron oxide prevalent on its surface gives it a reddish appearance.
Is primarily composed of hydrogen with a quarter of its mass being helium,
It has a prominent ring system that consists of nine continuous main rings and three discontinuous arcs, composed mostly of ice particles with a smaller amount of rocky debris and dust.
It is the coldest planetary atmosphere in the Solar System, with a minimum temperature of −224.2 °C.
It has a moon called "Triton"
It has five known moons: Charon (the largest), Nix, Hydra, Kerberos, and Styx
