About Neptune
Neptune
is one of the largest planets in our solar system. Neptune is also one of
the gas giants, they are large planets made up of mostly gas. Neptune is an outer
planet. Neptune orbits the Sun slowly because it is very far away. Neptune
is a planet with storms and winds. Neptune is suppose to be the eighth planet
from the sun. 
Neptune is currently the most distant planet from the Sun, with an orbital radius of 30 Astronomical Units and an orbital period of 165 years. Its diameter is about four times that of the Earth, which makes it the 4th largest planet. It is slightly smaller than Uranus, but its density is 1.6 g/cc (compared with 1.2 g/cc for Uranus), which makes it the 3rd most massive planet. The relatively low density indicates large concentrations of hydrogen and helium, but Uranus and Neptune both have much larger concentrations of heavier elements than Jupiter and Saturn. As for all the gas giant planets, models suggest rocky cores of maybe 15 Solar masses, but there is no direct confirmation of this.
Neptune has been particularly challenging to study from the ground because its disk is small and badly blurred by the Earth's atmosphere at that distance. In spite of this, ground-based astronomers had learned a great deal about this planet since its position was first predicted by Adams and Leverrier in 1845. However, our most detailed information about Neptune has come from the Voyager 2 flyby in 1989.
(Information Gathered by Google.com)
