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Science-Universe: Planets;
Earth,
by Wernher Krutein, NASA and
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Mass (kg)
...........................................................
5.98 x 10^24
Diameter (km)
.....................................................
12756
Mean density (kg/m^3)
.........................................
5520
Escape velocity (m/sec)
........................................
11200
Average distance from Sun (AU)
...........................
1
Rotation period (length of day in Earth hours)
........
23.93
Revolution period (length of year in Earth days)
.....
365.26
Obliquity (tilt of axis in degrees)
...........................
23.4
Orbit inclination (degrees)
.....................................
0
Orbit eccentricity (deviation from circular)
..............
0.017
Mean surface temperature (K)
................................
281
Maximum surface temperature (K)
.........................
310
Minimum surface temperature (K)
..........................
260
Visual geometric albedo (reflectivity)
.....................
0.39
Highest point on surface
........................................
Mount Everest (over 8 km above sea-level)
Atmospheric components
.......................................
78% nitrogen, 21% oxygen, 1% argon
Surface materials
...................................................
basaltic and granitic rock and altered materials
See also:
PLANETS
,
Observatories
,
Galaxies and Nebulas
,
Sun
,
Night Skies
,
TRANSPORTATION
,
CITIES
,
TECHNOLOGY
,
Futuristic Imagery
The Planets:
Asteroids
,
Borealis
,
Clouds Earth
, Earth,
Earth Resources Imaging
,
Jupiter
,
Mars
,
Mercury
,
our Moon
,
Neptune
,
Planetary System (Solar System)
,
Pluto
,
Saturn
,
Uranus
,
Venus
Spacecraft:
Sub-orbital-unmanned
,
Expendable-manned
,
Manned Lunar Exploration
,
Earth Orbiting Satellites, HST-Hubble Space Telescope
,
Planetary explorers-unmanned
,
Space Shuttle
,
Space Stations
,
UFO's and "Aliens"
,
Apollo
,
AVIATION
,
Spotting Scopes
415*552*9682