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  The Moon as seen from Earth(Sidereal period)
Orbital characteristics
Orbital circumference 2,413,402 km
(0.016 AU)
Eccentricity 0.0554
Perigee 363,104 km
(0.0024 AU)
Apogee 405,696 km
(0.0027 AU)
Revolution period 27.321 66155 d
(27 d 7 h 43.2 min)
Synodic period 29.530 588 d
(29 d 12 h 44.0 min)
Avg. Orbital Speed 1.022 km/s
Max. Orbital Speed 1.082 km/s
Min. Orbital Speed 0.968 km/s
Inclination varies between
28.60° and 18.30°
(5.145 396° to ecliptic)
see below
Longitude of the
ascending node
regressing,
1 revolution in 18.6 years
Argument of perigee progressing,
1 revolution in 8.85 years
Is a satellite of Earth
Physical characteristics
Equatorial diameter 3,476.2 km
(0.273 Earths)
Polar diameter 3,472.0 km
(0.273 Earths)
Oblateness 0.0012
Surface area 3.793 km2
(0.074 Earths)
Volume 2.1958 km3
(0.020 Earths)
Mass 7.347 673 kg
(0.0123 Earths)
Mean density 3,346.2 kg·m−3
Equatorial gravity 1.622 m·s−2,
(0.1654 gee)
Escape velocity 2.38 km·s−1
Rotation period 27.321 661 d
(synchronous)
Rotation velocity 16.655 km·h−1
(at the equator)
Axial tilt 1.5424° to ecliptic
see Orbit
Albedo 0.12
Magnitude -12.74
Surface temp.
min mean max
40 K 250 K 396 K
Bulk composition of the moon's mantle and crust estimated, weight percent Oxygen 42.6 % Magnesium 20.8 % Silicon 20.5 % Iron 9.9 % Calcium 2.31 % Aluminium 2.04 % Nickel 0.472 % Chromium 0.314 % Manganese 0.131 % Titanium 0.122 % Atmospheric characteristics Atmospheric pressure 3 × 10-13kPa Helium 25 % Neon 25 % Hydrogen 23 % Argon 20 % Methane
Ammonia
Carbon dioxide trace

The Moon is Earth's only natural satellite. It has no formal name other than "The Moon", although in English it is occasionally called Luna (Latin for moon), or Selene (Greek for moon), to distinguish it from the generic "moon" (natural satellites of other planets are also called moons). Its symbol is a crescent. The terms lunar, selene/seleno-, and -cynthion (from the Lunar deities Selene and Cynthia) refer to the Moon (aposelene, selenocentric, pericynthion, etc.).

The average distance from the Moon to the Earth is 384,403 kilometers (238,857 miles). The Moon's diameter is 3,476 kilometres (2,160 mi). Reflected sunlight from the Moon's surface reaches Earth in 1.3 seconds (at the speed of light).

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I wish China would make a serious attempt towards colonising the moon. If anything, it'd spur NASA, JAXA & the ESA into competing with them.
fnool (Jack Lamb) Fri, 06 Nov 2009 19:51:55 -0000
I wish China would make a serious attempt towards colonising the moon. If anything, it'd spur NASA, JAXA & the ESA into competing with them.
Apparently if you stand on the great wall of china you can see the moon haha
steph_leonard (steph leonard) Fri, 06 Nov 2009 13:55:01 -0000
Apparently if you stand on the great wall of china you can see the moon haha
I walk 2 England flew 2 china swam 2 brazil & floated 2 the moon just b4 breakfast.
Fugitive005 (Mr. Fugi) Thu, 05 Nov 2009 17:39:14 -0000
I walk 2 England flew 2 china swam 2 brazil & floated 2 the moon just b4 breakfast.
Do y'all have any idea why China wants to mine the moon? - Science assignment. :( Come on nerddies :) http://tumblr.com/xab3vbrvi
falloutkimmeh (Kim Le) Thu, 05 Nov 2009 16:20:03 -0000
Do y'all have any idea why China wants to mine the moon? - Science assignment. :( Come on nerddies :) http://tumblr.com/xab3vbrvi
Today in 2007, China's first lunar satellite, Chang'e 1 goes into orbit around the Moon. #china #space #moon
McMotherboard (Jason Watkins) Thu, 05 Nov 2009 14:13:12 -0000
Today in 2007, China's first lunar satellite, Chang'e 1 goes into orbit around the Moon. #china #space #moon
India plans Moon program. India/China the next space race? http://bit.ly/2lg2OX
JStevenYork (J. Steven York) Thu, 05 Nov 2009 10:32:16 -0000
India plans Moon program. India/China the next space race? http://bit.ly/2lg2OX

 
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