Credit & Copyright: Betul Turksoy
Explanation:
An
analemma is that
figure-8 curve you get when you mark
the position of the Sun at the same
time each day for one year.
But the trick to imaging an
analemma of the Moon is to wait bit
longer.
On average the Moon returns to the same position in the sky
about 50 minutes and 29 seconds later each day.
So photograph the Moon 50 minutes 29 seconds
later on successive days.
Over one lunation or lunar month it will trace out an analemma-like curve
as the Moon's actual position wanders due to
its tilted and
elliptical orbit.
Since the
featured image was taken over two months,
it actually shows a double lunar
analemma.
Crescent
lunar phases too thin and faint to capture
around the
New moon
are missing.
The two months the persistent astrophotographer chose were during a
good stretch of weather during July and August, and the location
was Kayseri,
Turkey
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NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
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Публикации с ключевыми словами:
Moon - lunation - Луна - лунный цикл
Публикации со словами: Moon - lunation - Луна - лунный цикл | |
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