Zum Begriff der astronomischen und der bürgerlichen Dämmerung

Details Zum Begriff der astronomischen und der bürgerlichen Dämmerung Zum Begriff der astronomischen und der bürgerlichen Dämmerung

Jan 1949

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1949dehyz...2..102r&link_type=abstract

Deutsche Hydrographische Zeitschrift, Volume 2, Issue 1-3, pp. 102-107

Astronomy and Astrophysics

Astronomy

Scientific paper

It is suggested to identify “civil twilight” only with a distinct range of the intensity of global illumination according to practical needs (i. e., in case of cloudiness, independent of astronomical data), whereas “astronomical twilight” means the whole interval between the sun's altitudes of 0° and -17°.

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