| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Equatorial system | Aerospace | A set of celestial coordinates based on the celestial equator as the primary great circle; usually declination and hour angle or sidereal hour angle. Also called equinoctial system of coordinates, celestial equator system of coordinates. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
