But presents and real-time interaction with Earthlings would be impossible on a Mars mission, which would be more similar, psychologically, to heading into the sunset with Ferdinand Magellan than to joining a trip to the moon in Apollo.

• 但在前往火星的任务中，与地面进行可视的实时通话是不可能的，从给人心理感觉上说，这个旅途更像是麦哲伦的环球航行而不是“阿波罗”登月任务。