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Neptune
Welcome to The Planet of Neptune.
Information about Neptune
|
| Mass |
kg |
1.02 x 10^26 |
| Diameter |
km |
30,700 mi.(49528 km) |
| Mean Density |
kg/m^3 |
1,640 |
| Escape Velocity |
m/sec |
23,300 |
| Distance from
the sun |
Shortest |
2,774,800,000
mi.(4,465,600,000 km) |
| Greatest |
2,824,000,000
mi.(4,546,100,000 km) |
| Mean |
2,798,800,000
mi.(4,504,300,000 km) |
| Rotation
Period (Length of Day) |
Earth Hours |
19.1 |
| Revolution
Period (Length of Year) |
Earth Years |
164.8 |
| Obliquity
(Tilt of Axis) |
Degrees |
29.6 |
| Orbit Inclination |
Degrees |
1.77 |
| Orbit
Eccentricity |
Deviation From Circular |
0.009 |
| Mean
Surface Temperature |
Fahrenheit |
-353 F |
| Visual Geometric Albedo |
Reflectivity |
0.51 |
| Atmospheric Components |
74%
hydrogen(H), 25% helium(He), and methane(CH4) |
| Rings |
Rings are
narrow, and contain concentrations of particles
called ring arcs |
| Number of Satellites |
8 |
|
Interesting Facts
|
| Johann Galle discovered
Neptune on Sept. 23, 1846 |
| There is a Great Dark Spot
on Neptune, a storm system as large as the Earth,
spinning round once every sixteen days made of
frozen methane |
| Neptune's axis is tilted at
28 degrees |
| Neptune has no solid
surface |
| Neptune may have a small
core of molten rock at its very center |
| The center of Neptune is
extremely hot: its temperature 7,000 C |
| Neptune's largest moon is
Triton, the coldest in the solar system |
| Neptune has a thick
atmosphere composed of hydrogen, helium, methane,
and ammonia, and a relatively low density |
|
Copyright © 1997, 1998. All rights reserved.
|