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Tri-color Full Moon
Tri-color on Tech Pan film - 16" f/4.5 Newtonian
The Moon is our closest astronomical neighbor lying just 239,000 miles from us. This photo of the Moon was shot with a very precise photographic technique called "tri-color". The purpose of this was to determine if the subtle geological differences in the seas and mountains of the moon could be recorded on film. If you look closely you can distinguish between the "steely blue" and "brownish" hues on the surface. These differences are particularly noticeable in the large mares (seas).
Why do we always see the same side of the moon? Because after millions of years of orbiting the Earth, the Moon's rotation has been slowed by gravity to the point that it always keeps one face towards the Earth.
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