Neptune, the eighth planet from the Sun, is known as an ice giant. The earliest information that was known about Neptune was based on mathematical evidence. The orbit of Uranus was affected by Neptune's orbit. Since then, information has been gathered about Neptune through observation by high-powered telescopes and by one visit from a spacecraft, the Voyager 2.
Function
The atmosphere of ice giants, such as Neptune, is made up mostly of hydrogen and helium. Neptune's atmosphere also contains water, methane and ammonia. Traces of hydrocarbons have been found as well. It is also believed that there is some nitrogen in the atmosphere, but that hasn't been confirmed.
Geography
Neptune is made up primarily of rocks and ice. The great presence of ice is due, in part, to Neptune's distance from the sun.
Features
The temperature varies greatly on Neptune. The planet core is approximately 7,000 degrees C, while the upper atmosphere temperatures fall to -218 degrees C.
Identification
Neptune appears blue in color, and this is due to the presence of methane in the atmosphere. Methane absorbs the colors at the red end of the spectrum, reflecting the blues at the opposite end of the spectrum, giving the planet a vivid blue color.
Features
The strongest winds in the Solar System are found on Neptune, with winds at speeds of 2100 km/h. Neptune, unlike many uninhabited planets, does experience weather. Very active wind storms, viewable from space telescopes, occur frequently.
Tags: about Neptune, blue color, Neptune made
