How to measure the distance between earth and moon using the phenomena of parallax? Can u please explain it once again?
Asked by | 29th May, 2011, 12:00: AM
Determination of distance of moon from earth (by parallax method)
The angle q, caused by the two lines drawn from the position of the two eyes to the object, is called angle of parallax.
However, if we consider O, referred in the above diagram to be the moon or a nearby star, then the angle q is too small in the view of the large astronomical distance and the place of observation. Hence, in order to have a better and valid point of observation, two points on the surface of the Earth is taken as the basis for observation instead of the two eyes. In order to have simultaneous observation of the moon, we select a very distant star at O and measure the angle between O and the two points on the Earth, as shown in the diagram below
Answered by | 30th May, 2011, 08:58: AM
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