Minute Of Arc
A minute of arc, arcminute, or minute arc (MOA), is a unit of angular measurement equal to one sixtieth (1⁄60) of one degree (circle⁄21,600), or (π⁄10,800) radians. In turn, a second of arc or arcsecond is one sixtieth (1⁄60) of one minute of arc. Since one degree is defined as one three hundred and sixtieth (1⁄360) of a rotation, one minute of arc is 1⁄21,600 of a rotation. It is used in those fields which require a unit for the expression of small angles, such as astronomy, optometry, ophthalmology, optics, navigation and marksmanship.
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Famous quotes containing the words minute of, minute and/or arc:
“I make this in a warring absence when
Each ancient, stone-necked minute of love’s season
Harbours my anchored tongue....”
—Dylan Thomas (1914–1953)
“The trick, which requires the combined skills of a tightrope walker and a cordon bleu chef frying a plain egg, is to take your [preteen] daughter seriously without taking everything she says and does every minute seriously.”
—Stella Chess (20th century)
“Male urination really is a kind of accomplishment, an arc of transcendance. A woman merely waters the ground she stands on.”
—Camille Paglia (b. 1947)