The difference between Arcsecond and Second of arc
When used as nouns, arcsecond means a unit of angle, whereas second of arc means an angle, one sixtieth (1/60th) of a minute of arc or one 3600th of a degree.
check bellow for the other definitions of Arcsecond and Second of arc
-
Arcsecond as a noun:
A unit of angle; 1/60th of an arcminute, or 1/3600th of a degree.
-
Second of arc as a noun:
An angle, one sixtieth (1/60th) of a minute of arc or one 3600th of a degree.