A region (of the air or of the heavens). Obsolete.

Astronomy. A region or belt of the sky comprised between definite limits, e.g. between two parallels of declination.

†(a) a narrow band of the sky or space that is rich in stars (obsolete); (b) Astronomy a large group of stars having similar proper motions; esp.…

Astronomy. A narrow band or strip in the sky that differs markedly from its immediate surroundings (e.g. in containing no observable stars or in…