Autumnal equinox
type: Concept
contributor: AAS Frey.Katie
modified: 2020-11-03T18:36:17.481Z
modified: 2020-11-03T18:36:03.8Z
broader: Equinox
definition: One of the two points where the ecliptic crosses the celestial equator. At the autumnal equinox the Sun appears to be moving across the equator from the northern celestial hemisphere to the southern celestial hemisphere. The instant of the event.

Equinox
type: Concept
narrower: Autumnal equinox