Neptune is the eighth farthest known planet from our sun. It was discovered on September 23, 1847, by Johann Gottfried Galle. Neptune is 451,00 km ( 30.1 AU ) away from the sun. It’s known for being the windiest and the coldest (-235) planet. The name Neptune is the name of the Roman god of the sea.
Composition
Neptune is a frozen gas. It is mainly made of hydrogen. Neptune’s core is made of iron and other metals. Its mantle is made of water, ammonia, and methane. The temperature inside of the mantle can range from 1,727 degrees Celsius to 4,727 degrees Celsius. Neptune’s atmosphere is 83% hydrogen, 13% helium, and 4% methane. Neptune has 6 rings, and they’re made of dust particles.
Colour
Neptune’s colour is a radiant azure blue.