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![]() Famous "Blue Marble" photograph of Earth, taken from Apollo 17. | |||||||||||||
Designations | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Adjectives | Terrestrial, Terran, Telluric, Tellurian, Earthly | ||||||||||||
Orbital characteristics | |||||||||||||
Epoch J2000 | |||||||||||||
Aphelion | 152,097,701 km 1.0167103335 AU | ||||||||||||
Perihelion | 147,098,074 km 0.9832898912 AU | ||||||||||||
149,597,887.5 km 1.0000001124 AU | |||||||||||||
Eccentricity | 0.016710219 | ||||||||||||
365.256366 days 1.0000175 yr | |||||||||||||
Average orbital speed | 29.783 km/s 107,218 km/h | ||||||||||||
Inclination | Reference (0) 7.25° to Sun's equator | ||||||||||||
348.73936° | |||||||||||||
114.20783° | |||||||||||||
Known satellites | 1 (the Moon) | ||||||||||||
Physical characteristics | |||||||||||||
6,371.0 km[1] | |||||||||||||
Equatorial radius | 6,378.1 km[2] | ||||||||||||
Polar radius | 6,356.8 km[2] | ||||||||||||
Flattening | 0.0033528[2] | ||||||||||||
Circumference | 40,075.02 km (equatorial) 40,007.86 km (meridional) 40,041.47 km (mean) | ||||||||||||
510,072,000 km²[3]
148,940,000 km² land (29.2 %) | |||||||||||||
Volume | 1.0832073×1012 km³ | ||||||||||||
Mass | 5.9736×1024 kg | ||||||||||||
Mean density | 5.5153 g/cm³ | ||||||||||||
9.780327 m/s²[4] 0.99732 g | |||||||||||||
11.186 km/s 40,270 km/h | |||||||||||||
0.997258 d 23h 56m 04.09054s[4] | |||||||||||||
Equatorial rotation velocity | 465.11 m/s | ||||||||||||
23.439281° | |||||||||||||
Albedo | 0.367 | ||||||||||||
| |||||||||||||
Atmosphere | |||||||||||||
Surface pressure | 101.3 kPa (MSL) | ||||||||||||
Composition by volume | 78.08% Nitrogen (N2) 20.95% Oxygen (O2) 0.93% Argon 0.038% Carbon dioxide About 1% water vapor (varies with climate)[5] | ||||||||||||
- ^ This is the radius that gives a sphere with the same volume as the WGS 84 reference ellipsoid.
- ^ a b c The WGS 84 reference ellipsoid.
- ^ Pidwirny, Michael (2006-02-02). "Surface area of our planet covered by oceans and continents.(Table 8o-1)". University of British Columbia, Okanagan. Retrieved 2007-11-26.
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(help) - ^ a b Yoder, C. F. (1995) p. 12.
- ^ Cite error: The named reference
earth_fact_sheet
was invoked but never defined (see the help page).