Astronomy View all facts Glossary Help |
| physical phenomena > event > celestial event > periodic celestial event > equinox > autumnal equinox |
| autumnal equinox comparison table | |||
| Subject | is an instance of | is a kind of | has definition |
|---|---|---|---|
| equinox | periodic celestial event | Either of the two points on the celestial sphere at which the ecliptic intersects the celestial equator; also the time at which the Sun passes through either of these intersection points; i.e., when the apparent longitude (see apparent place; celestial longitude) of the Sun is 0° or 180°. (See catalog equinox; dynamical equinox for precise usage.) | |
| autumnal equinox | equinox | See equinox |
Next equinox: vernal equinox Up: equinox