Neptune is not solid. Neptune is a gas planet. It has 8-13 moons. Neptune has mountains. There are 6 rings. It rains on Neptune. That means there are clouds. Neptune's atmosphere is made out of gases. It is the color blue because of methane (a type of gas.)     

Did you know that water makes Earth blue but Neptune is blue because of methane gas? There is only 1 moon for Earth, but Neptune has 8 to 13  moons. We can live on Earth because of oxygen, water, good tempature, solid, has air, and gravity, but Neptune doesn’t have any of those things. Life can not be on Neptune because it is a gas planet.