Aquila (constellation) Aquila is a summer constellation located a few degrees north of the celestial equator. Represented as an eagle, it contains the bright star Altair and lies along the Milky Way with…
Celestial equator: definition, geometry, and astronomical role Celestial equator The celestial equator is the projection of Earth's equator onto the celestial sphere. This article explains its geometry, observational appearance, role in coordinates, and importa…
