An Etymological Dictionary of Astronomy and Astrophysics

A star that is always seen above the horizon from a given position. These stars are located between the celestial pole and a diurnal circle with an angular distance smaller than the altitude of the pole. Same as → circumpolar star.

Etymology (EN): Nonsetting, from → non- + setting adj. of → set; → star.

Etymology (PE): Setâré, → star; hamiše peydâ literally “always visible,” coined by Biruni (A.D. 973-1050) in his at-Tafhim, from hamišé “always,” → perpetual,

• peydâ, → visible.