arc second
[/ɑːrk ˈsɛkənd/]
nounpl: arc seconds
segundo de arco
1. A unit of angular measurement equal to 1/3600 of a degree, or 1/60 of an arcminute
The telescope can resolve objects separated by less than one arc second.
O telescópio pode resolver objetos separados por menos de um segundo de arco.
2. A unit used in astronomy, surveying, and precision measurements to express very small angles
The star's parallax was measured at 0.5 arc seconds.
A paralaxe da estrela foi medida em 0,5 segundo de arco.
Arc seconds are primarily used in scientific and technical contexts, particularly in astronomy for measuring stellar positions and distances, in geodesy for surveying, and in precision engineering. The term is universal across English and Portuguese-speaking scientific communities and requires no cultural adaptation.
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