Besides radio observation, an artificial comet was used to determine the rocket's bearings when it was thousands of miles away from the Earth.
“人造的慧星”除收音机观察之外，当它是数以千计里远离地球的时候，一颗人造的慧星用来决定火箭的举止。
Besides radio observation, an artificial comet was used to determine the rocket's bearings when it was thousands of miles away from the Earth.
“人造的慧星”除收音机观察之外，当它是数以千计里远离地球的时候，一颗人造的慧星用来决定火箭的举止。
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