Arc minutes is a unit used to measure angles in astronomy. It refers to 1/60th of an arc second, which itself is 1/3600th of a degree. An angle measured in arc minutes has a value that is one-sixty-fourth the size of an angle measured in degrees.
Sentences with «arc minutes»
6 - inch or larger telescopes will show many more stars tightly packed within an area 13 arc minutes in apparent size. (messier-objects.com)
«The angular resolution of the eye is 0.6 arc minutes per pixel,» he wrote in an e-mail to tech publications in 2010. (scientificamerican.com)
NGC 6638 is a class VI globular cluster occupying an area of 2 arc minutes about half a degree to the east of Lambda Sagittarii. (constellation-guide.com)