In general, the most effective period for observing stars and planets occurs during the darker limit of __________.
A
sunset
B
civil twilight
C
nautical twilight
D
astronomical twilight
E
İlgili Sorular
The steady current circling the globe at about 60°S is the __________.The 12-foot low-velocity fog applicator ________________.The COASTAL DRILLER, loaded as shown in the Sample Load Form #4 (Storm), discharges all the bulk in ...The MOST important element in administering CPR is ________."Rotation" is the __________.