This article about knowing some of the known and unknown secrets of the earth and the measurements, orbital and physical characteristics of Earth.

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So this is all about

The Earth |

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__Are there any Alternative names for the earth?__

- The answer is yes, there are some alternative names for the Earth they are
**Terra, Tellus, Gaia, Gaea, the World.** - And the Adjective form of the name of the Earth is
**Earthly, terrestrial, Terran, tellurian.**

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__The Orbital characteristics of the Earth__

**The apsides of the Earth is Aphelion:152100000 km(94500000 mi; 1.017 AU), Perihelion:147095000 km(91401000 mi; 0.98327 AU).****The Semi-major axis of Earth is 149598023 km(92955902 mi; 1.00000102 AU).****The Eccentricity of the Earth is 0.0167086.****The Orbital period of the Earth in 365.256363004 days(1.00001742096 yr).****The Average orbital speed of the Earth is 29.78 km/s(107200 km/h; 66600 mph).****The Mean anomaly of Earth is 358.617°.****The Inclination of the Earth is 7.155° to the Sun's equator;1.57869° to invariable plane;0.00005° to J2000 ecliptic.****The Longitude of ascending node of Earth is −11.26064° to J2000 ecliptic.****The Argument of the perihelion of Earth is 114.20783°.****The satellities of the earth are**

**1 natural satellite: the Moon****5 quasi-satellites****1 800 operational artificial satellites****16 000 space debris**

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__The Physical Characteristics of the Earth__

**The Mean radius of Earth is 6371.0 km (3958.8 mi).****The Equatorial radius of Earth is 6378.1 km (3963.2 mi).****The Polar radius of Earth is 6356.8 km (3949.9 mi).****The Ellipticity of Earth is 0.0033528,1/298.257222101 (ETRS89).****The Circumference of Eart is 40075.017 km equatorial (24901.461 mi),40007.86 km meridional (24859.73 mi).****The total Surface area of Earth is 510072000 km2 (196940000 sq mi),148940000 km2 land (57510000 sq mi; 29.2%),361132000 km2 water (139434000 sq mi; 70.8%).****The total Volume of Earth is1.08321×1012 km3 (2.59876×1011 cu mi).****The total mass of the Earth is 5.97237×1024 kg (1.31668×1025 lb),(3.0×10−6 M☉).****The Mean density of Earth is 5.514 g/cm3 (0.1992 lb/cu in).****The Surface gravity of Earth is 9.80665 m/s2 (1 g; 32.1740 ft/s2).****The Normalized polar Moment of the inertia factor of Earth is 0.3307.****The Escape velocity of Earth is 11.186 km/s(40270 km/h; 25020 mph).****The Sidereal rotation period of Earth is 0.99726968 days(23h 56m 4.100s).****The Equatorial rotation velocity of Earth is 0.4651 km/s(1674.4 km/h; 1040.4 mph).****The Axial tilt of Earth is 23.4392811°.****The Albedo of Earth is 0.367 geometric,0.306 Bond.****Surface temp. min mean max****Kelvin: 184 K 287.16 K (years 1961-1990) 330 K****Celsius: −89.2 °C 14.0 °C (years 1961-1990) 56.9 °C****Fahrenheit: −128.5 °F 57.2 °F (years 1961-1990) 134.3 °F**

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__The atmosphere of Earth consists of?__

**The surface pressure of Earth is 101.325 kPa (at MSL)**##
__Gases% in Earth__

**78.08% nitrogen (N2; dry air)****20.95% oxygen (O2)****1% water vapor (climate variable)****0.9340% argon****0.0408% carbon dioxide****0.00182% neon****0.00052% helium****0.00017% methane****0.00011% krypton****0.00006% hydrogen**

So this is all about

**The secrets of the blue marble(Earth).**Hope you like it.

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