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
|