civil polar night

GPTKB entity

Statements (13)
Predicate Object
gptkbp:instanceOf astronomer
gptkbp:defines period when the sun does not rise above the horizon and civil twilight does not occur
gptkbp:duration up to several weeks
https://www.w3.org/2000/01/rdf-schema#label civil polar night
gptkbp:occurredIn polar regions
gptkbp:occurs_north_of latitude 72°34′ N
gptkbp:occurs_south_of latitude 72°34′ S
gptkbp:relatedTo gptkb:astronomical_polar_night
gptkb:nautical_polar_night
polar night
gptkbp:sun_altitude always below -6°
gptkbp:bfsParent gptkb:Polar_night
gptkbp:bfsLayer 7