Descriptions | Abbreviations | Adjusted values |
Earth Mean density |
| 5.515 g/cm3 [53] |
Distance value that light travel along one year |
| 9.460730472 × 1012 km [53] |
1Parsec in miles |
| 19.174 Trillion miles = 1.9174 × 1013 miles [53] |
1Parsec in light year |
| 3.261633 Light year [53] |
Standard gravity of earth |
| 980.665 cm/s2 ≅ 9.80665 m/s2 [56] |
Thickness of homosphere |
| 80 - 100 km [57] [66] |
1Parsec in km |
| 30.8567758149137 trillion kilometers [58] ≅ 3.0856776 × 1016 meters [53] |
Sidereal rotation period | SRP | 0.99726968 d (23 h 56 m 4.100 s) [53] [58] |
Equatorial diameter |
| 12,756.2732 km ≅ 12,756.274 [50] [59] |
Equatorial radius |
| 6,378,136.6 ± 0.1 m [50] [59] = 6,378.1366 km = 6.3781366 × 106 m [60] ≅ 6,378,137 m [50] [59] |
Speed of light | C | 299,792.458 ms−1 = 2.99792458 × 108 ms−1 [48] [50] [51] [52] [60] |
Earth density |
| 5.514 gr/cm3 [54] [61] |
Volume percent of helium gas in dry atmosphere |
| 0.000524% = 5.24e−4% 5.2 parts per million [62] [63] |
Volume percent of xenon gas in dry atmosphere |
| 0.0000087% Percent by volume 87 ± 1 parts per billion (nL/L) [64] |
Diameter of earth |
| 12,742 km [65] |
Earth radius (Mean radius) |
| 6,371 km (3958.8 mi) [65] |
Earth’s orbital inclination to sun’s equator |
| 7.155˚ [66] |
Age of the primordial earth | AOE | 4.54 billion years 4.54 ± 0.04 Gya [67] [68] [69] [70] |