‘A saw the new muin late yestreen
Wi the auld muin in her airm
And gif we gang tae sea, maister,
A fear we’ll cam tae hairm.’
-Sir Patrick Spens
"The old moon in the new moon's arms" is an atmospheric phenomenon when earthshine causes the face of the moon to be faintly visible at new moon. In Britain it can indicate storm clouds in the Atlantic.
