By the time it arrives at its greatest elongation, it will appear roughly half-illuminated and the amount of its surface illuminated by the Sun will continue to decrease in the days to come.
在它到达最大距角(elongation)时，它将看上去大概为半明亮、被太阳照明的部分将在持续日子里减少。
At greatest eastern elongation, Mercury swings farthest east of the sun, and briefly appears as an evening "star" after sunset.
这是水星是最大程度的在太阳东部的延伸，这是今晚日落后最简短的一次显示。
Mercury - the solar system's innermost planet - is at its greatest eastern elongation today.
水星——太阳系最里面的行星—今天是东部最大的延伸。
Mercury won't reach its greatest evening elongation again until April 8, 2010.
水星将在2010年8月延伸最大最大一次之后在不会延伸。
Don't tarry when looking for Mercury. Even at its greatest eastern elongation, Mercury sets less than 1.5 hours after the sun tonight.
在寻找水星的时候，无须驻足等候。即便处在东大距，日落之后不到1个半小时，水星便下沉了。
Don't tarry when looking for Mercury. Even at its greatest eastern elongation, Mercury sets less than 1.5 hours after the sun tonight.
在寻找水星的时候，无须驻足等候。即便处在东大距，日落之后不到1个半小时，水星便下沉了。
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