Muin

Frae Wikipedia

The Muin is the Yird's ae naitural satellite, an the fift lairgest muin in the Solar Seestem. The average centre-tae-centre distance frae the Yird til the Muin is 384,403 km (238,863 mile), aboot thirty times the diameter o the Yird. The Muin haes a diameter o 3,474 km (2159 mi)^[1]—a wee bit mair nor a quarter that o the Yird an a bittie smawer than the lenth athort the Unitit States. Ftrae that the vollum o the Muin is near 1/50^t that o the Yird. The gravitational pull at its surface is aboot 1/6^t o the Yird's. The Muin maks a full orbit aboot the Yird in 27.3 days, an the periodic variations in the geometry o the Yird–Muin–Sun seestem causes the lunar phases that repeats ilka 29.5 days.

The Muin is the ae celestial body that fowk haes veesitit. The first airtifeecial object tae lea' the Yird's gravity an tae gang by the Muin wis the Soviet Union's Luna 1, the first airtifeecial object tae dunt the lunar grund wis Luna 2, an the first photographs o the hintside o the Muin wis duin bi Luna 3, aw in 1959. The first spaceship tae mak a successfu lunar saft laundin wis Luna 9, an the first unmanned vehicle til orbit the Muin wis Luna 10, baith in 1966.^[1] The Unitit States (U.S.) Apollo programme cairiet oot juist the ae series o manned meesions tae date, resultin in sax laundins atween 1969 an 1972. Human exploration o the Muin ceased wi the end o the Apollo programme, tho, as o 2007, a puckle kintras haes annoonced plans tae send aither fowk or robotic spaceships tae the Muin.

[edit] References

1. ↑ ^{1.0 1.1} Spudis, P.D. (2004). Moon. World Book Online Reference Center, NASA. Retrieved on 12 Apryle 2007. .

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