In general, the most effective period for observing stars and planets occurs during the darker limit of __ ~ PINOY SEAMAN PH

Tuesday, September 26, 2017

In general, the most effective period for observing stars and planets occurs during the darker limit of __

BoredParroT9:00 PM No comments

In general, the most effective period for observing stars and planets occurs during the darker limit of ___.

A.sunset
B.astronomical twilight
C.nautical twilight
D.civil twilight

Answer:

D.civil twilight

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