It should be obvious ("Elementary, Dr. Watson") that "twilight" also occurs in the morning, before sunrise. Should I presume that the scientific terms involving Civil, Nautical and Astronomical twilight use the same solar angular standards as for evening twilight? Or - - is there another word, other than "twilight" - - to describe the pre-dawn event?
It should be obvious ("Elementary, Dr. Watson") that "twilight" also occurs in the morning, before sunrise. Should I presume that the scientific terms involving Civil, Nautical and Astronomical twilight use the same solar angular standards as for evening twilight? Or - - is there another word, other than "twilight" - - to describe the pre-dawn event?