Moon Earth distance measurements

janobearn 657 views 4 slides Jul 11, 2012
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EARTH'S RADIUS MEASUREMENT
Eratosthenes method
20. march 2012
City Country School DISTANCE ANGLE CIRC DIAMETER
Alor Akar Malaysia SMK Alor Akar 4745,78 3,091 39430 12551
Fontenay le C France Collège Tiraqueau 46,42

MOON'S RADIUS MEASUREMENT
Moon eclipse
15. june 2011
Earth shadow diameter = 13.31
Moon diameter = 4.76
Earthshadowdiameter
Moondiameter
=2,79
Measurements made with Geogebra
Photo : C. Baudouin Astro Club 85
Earthdiameter=3,79Moondiameter
Moondiameter=
Earthdiameter
3,79

DISTANCE MEASUREMENT
Moon artificial eclipse by 2 cents coin
Coin Observateur distance = 2280 mm
Coin diameter = 19 mm
Moondiameter
Coindiameter
=
MoonObservateurdistance
CoinObservateurdistance
MoonObservateurdistance
Moondiameter
=
2280
19
Measurements :
MoonObservateurdistance=Moondiameter×120

FINAL CALCULATION
MoonObservateurdistance=Moondiameter×120
Moondiameter=
Earthdiameter
3,79
We measured :
Earthdiameter=12551km
So :
MoonObservateurdistance=
12551
3,79
×120
MoonEarthdistance=397393km