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A Dark Moon describes the Moon during that time that it is invisible against the backdrop of the Sun in the sky. The duration of a Dark Moon is between 1.5 and 3.5 days, depending on the orientation of the Earth and Sun. In astronomical usage, the New Moon occurs in the middle of this period, when the Moon and Sun are in conjunction. This definition has entered popular usage, so that calendars will typically indicate the date of the New Moon rather than the Dark Moon. However, originally New Moon referred to the crescent on the first night it is visible, one or two days after conjunction. Maritime records from the nineteenth century distinguish the Dark Moon (no Moon) from the New Moon.
At New Moon, the Moon comes all the way around in its orbit and is more or less between Earth and the Sun. The New Moon can not be seen from Earth, except during a solar eclipse when the Moon passes in front of the Sun and the night portion of the Moon becomes visible to us surrounded by the Sun’s fiery corona.
A Full Moon is the lunar phase that occurs when the Moon is completely illuminated as seen from the Earth. This occurs when the moon is in opposition to the Sun (when it is on the opposite side of the Earth from the Sun; more precisely, when the ecliptic longitudes of the Sun and Moon differ by 180 degrees). This means that the hemisphere of the Moon that is facing the Earth (the near side) is almost fully illuminated by the Sun and appears round (while the far side is almost completely unilluminated).
BEAUTIFUL Bought the moon to put on my raven necklace, it sits perfectly. Lovely solid bead.