dcterms modified equal to or less than 2020-11-19T16:45:13.874Zequal to or more than 2020-11-19T16:45:13.874Z
broader original
1722 original
definition The diffused light from the sky when the Sun is below the horizon, either from daybreak to sunrise or, more commonly, from sunset to nightfall. There are three types of twilight: astronomical twilight, civil twilight, and nautical twilight. They are divided on the basis of the solar depression angle.
Resource original
Concept original
contributor AAS_Frey.Katie original