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 (young crescent).
Famous quotes containing the words dark and/or moon:
“When have I last looked on
The round green eyes and the long wavering bodies
Of the dark leopards of the moon?
All the wild witches, those most noble ladies,
For all their broom-sticks and their tears,
Their angry tears, are gone.”
—William Butler Yeats (1865–1939)
“No, they are dark and wrinkled and hairy,
caves of the Moon . . .——— And when a
dark humming fills us, a
coldness towards life,
we are too much women to
own such unwomanliness.”
—Denise Levertov (b. 1923)