Christopher Ward C9 MOONPHASE, Руководство пользователя

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10
HOW TO OPERATE YOUR C9 MOONPHASE
THE MOON AND ITS PHASES
The phases of the moon cycle, from one new
moon to the next one, lasts 29 days,
12 hours, 44 minutes and 2.8 seconds.
The new moon corresponds to the first lunar day
(fig. 1). The moon is not visible because its dark
side is facing us.
On the 8
th
day (fig. 2), after completing one quarter
turn, a crescent moon appears on the left-hand side
of the moonphase window with the curve facing to
the right.
On the 15
th
day of the lunar cycle (fig. 3), at the
mid-point of its revolution, we see a fully illuminated
circle at the 12 o’clock position, indicating the full
moon. The moon at this point is directly opposite
the sun.
On the 23
rd
day of the lunar cycle (fig. 4), at the
end of its third quarter, the crescent appears on
the right-hand side of the moonphase window.
A new lunar cycle now commences.
The moon changes continuously between these
characteristic positions. The time which has
elapsed between two new moons corresponds
to approximately one month.
Due to the regular and repetitive nature of this
movement and its phases, the moon has always
served as a means of counting the passage of time.
Indeed, this is why the lunar calendar is still used for
timekeeping purposes.
Fig.1
Fig.3
Fig.2
Fig.4