Dawn and dusk
This plot shows the time (UT) of dawn and dusk for Pic du Midi, assuming a solar dip of 10 degrees (roughly "civil twilight", astronomical twilight is calculated for 18 degrees).
posted by Carl-Fredrik Enell at 16:44
Thursday, September 08, 2005
This plot shows the time (UT) of dawn and dusk for Pic du Midi, assuming a solar dip of 10 degrees (roughly "civil twilight", astronomical twilight is calculated for 18 degrees).
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