For nine years the surveyor pumped out data until November 2, when it emerged from a communications blackout behind Mars and never beamed another signal.
For nine years the surveyor pumped out data until November 2, when it emerged from a communications blackout behind Mars and never beamed another signal.
9年来该勘探者都能发射出信号.直到11月2日,该卫星从一次通讯故障恢复后就没有再发射出任何信号.