And while we are pondering the young crescent Moon, consider these lines from Coleridge's Ancient Mariner:
The last line suggests the sort of thing you see on the Pakistani flag, and the flags of some other Moslem countries -- a star within the dark of the Moon. But of course this is impossible, as is apparent with a very young Moon when you can see the dark part of its face lit by earthshine -- sunlight reflected from the Earth. The Turkish flag gets the star part right, but (like the Pakistani flag) gives the crescent too much of a grasp; the horns of the Moon's crescent do not extend beyond a diameter.We listened and looked sideways up!
Fear at my heart, as at a cup,
My lifeblood seemed to sip!
The stars were dim and thick the night,
The steersman's face by his lamp gleamed white;
From the sails the dew did drip --
Til clomb above the eastern bar
The horned moon, with one bright star
Within the nether tip.