3 ms·
This https://www.timeanddate.com/astronomy/different-types-twilight.html https://www.timeanddate.com/astronomy/different-types-twilig... is probably a good appr
by smackay 7y ago
This https://www.timeanddate.com/astronomy/different-types-twilight.html https://www.timeanddate.com/astronomy/different-types-twilig... is probably a good approximation.