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Neptune - Wikipedia, the free encyclopedia
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Neptune is the eighth and outermost-known planet from the Sun in the Solar System. Named for the Roman god of the sea, it is the fourth-largest planet by diameter and the third-largest by mass. Neptu...
en.wikipedia.org/wiki/Neptune
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Neptune, the eighth and furthest planet from the Sun, is a very cold place. Its bluish color is caused by small amounts of methane gas in its atmosphere. The planet has 13 moons and a very narrow, faint ring system.
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www.windows.ucar.edu/tour/link=/neptune/neptune.html
www.windows.ucar.edu/tour/link=/neptune/neptune.html
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World Book Article on Neptune ... The blue clouds of Neptune are mostly frozen methane, the main chemical in natural gas -- a fuel for heating and cooking on Earth. The other object shown is Neptune's moon Triton. Image credit: NASA/JPL...
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www.nasa.gov/worldbook/neptune_worldbook.html
www.nasa.gov/worldbook/neptune_worldbook.html
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NSSDC Photo Gallery: Neptune - A collection of images of the planet Neptune and its satellites ... Color image of Neptune showing its "Great Dark Spot". P-34611C 59K...
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nssdc.gsfc.nasa.gov/photo_gallery/photogallery-neptune....
nssdc.gsfc.nasa.gov/photo_gallery/photogallery-neptune.html
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Neptune/Earth Comparison ... Neptune Earth Ratio (Neptune/Earth) Semimajor axis (106 km) 4,495.06 149.60 30.047 Sidereal orbit period (days) 60,189. 365.256 164.79 Tropical orbit period (days) 59,799.9 365.242 163.73 Perihelion (106 km) 4,444.45 147.09 30.216 Aphelion (106 km) 4,545.67 152 ... Neptune Observational Parameters...
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nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.htm...
nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.html
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Neptune and Uranus are very much alike. They are both large gas planets that look like big blue-green balls in the sky. Neptune has winds in its atmosphere which blow at over 2000 kilometers per hour! This planet has large, dark circles on its surface which astronomers believe to be storms.
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starchild.gsfc.nasa.gov/docs/StarChild/solar_system_lev...
starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/neptune.html
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