Venus is the second planet from the Sun and is an inner planet made of iron silicate and nickel. It has an atmosphere composed of carbon dioxide and nitrogen and an average temperature of 467°C. Venus has no moons and orbits the Sun every 2,264 days. Neptune is the eighth planet located in the outer solar system. It is made of rocky core, water, and liquid hydrogen, and has an atmosphere of hydrogen, helium, and methane. Neptune has 13 moons and orbits the Sun once every 1,648 years.