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Neptune
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By Mariesa Miller
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Named after the Roman God of the sea
First planet to be discovered without actually
seeing it
Only one star craft has ever been to Neptune
History
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Very blue
Mostly helium and hydrogen atmosphere
About 17 times Earths mass and about 58 times
Earths volume
Very windy! 1,500 mph
Physical Features
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Rocky core about the size of Earth
Composed mostly of ice, hydrogen, and helium
Mantle is made of water, ammonia and
methane ices
What’s Inside
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Farthest planet from the sun
The orbit sometimes overlaps Pluto
Orbits every 164.79 years
One year on Neptune is 164.79 Earth years
Neptune’s axial tilt is 28.32 degrees
Orbit and Rotation
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13 moons
Triton was discovered on October, 10 1846
Triton circles Neptune in the opposite direction
Neptune rotates
Triton is extremely cold; -400 degrees
Fahrenheit
Six moons were discovered by Voyager 2
The Moons
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Short lived
Discovered in 1989
One of four planets with rings
Five rings
The Rings
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“Neptune: The Other Blue Planet in our Solar
System” Space.com http://www.space.com/41neptune-the-other-blue-planet-in-our-solarsystem.html/
“Neptune” All About Astronomy
http://www.enchantedlearning.com/subjects/as
tronomy/planets/neptune/neptuneinside.shtml
“Neptune: Moons” NASA
http://science.nasa.gov/search/?q=neptune&cat
egory=Solar+System
Google Images
Sources