A、on the prime vertical
B、a latitude line
C、a longitude line
D、of no special significance
更多“A star is observed at lower transit. The line of position derived from this sight is（）.”相关的问题
A、as the basis for star charts B、to enter a star finder C、in sight reduction using Pub 249 D、in sight reductions of planet observations
A、has a declination equal to twice that of the Sun B、comprises two stars that appear close together C、is twice as bright as a single star D、suddenly becomes much brighter and then fades
A、2.5 times as bright as a second magnitude star B、3 times as bright as a second magnitude star C、5 times as bright as a second magnitude star D、10 times as bright as a second magnitude star
A、is most accurate before sunrise B、is most accurate after sunset C、should only be observed when the Sun's lower limb is above the horizon D、is most accurate when the Sun's center is observed on the visible horizon
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