The Last Planet
Neptune is the eighth and final planet of the solar system (excluding dwarf planets), which means it is fourth and final gas giant of the solar system. It also means it is the farthest planet from the Sun, at a whooping 30.1 AU! Despite this fact, Neptune has a lower mass than Jupiter, at about 1.024 * 10^26 kg. One Neptune day is equal to 16 hours and 6 minutes, however, one year is a WHOOPING 165 Earth years! Yes, you heard that right. Almost 2 centuries! Neptune was founded by Urbain Le Verrier, in 1846.
Neptune, as seen, is shown as a dark blue planet, with a fluid mix of water and ammonia and methane.
Neptune's core is rocky, with silicate and metals, as well as a mantle that consists of water, ices, and methane.