
Originally Posted by
slug_burner
What do you mean? The moon is orbiting around the earth and when it is up in the night sky it is further away than when just above the horizon that is why it looks smaller


If you want to be pedantic about it, it is actually closer when directly overhead - it is close enough to the same distance from the centre of the earth (actually the centre of the earth/moon system, but for these purposes its near enough to the same since the moon is so much smaller than the earth), but when directly overhead we are closer to the moon by the radius of the earth compared to when it is on the horizon. But the difference is actually too small to measure easily. Try measuring the angular diameter of the moon with a sextant - it is almost exactly the same - I have done this. (the small difference is due to refraction which distorts the image near the horizon).
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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