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原文:
Tonight a bright full Moon will fade to red. Tonight’s moon will be particularly bright because it is reaching its fully lit phase when it is relatively close to the Earth in its elliptical orbit. In fact, by some measures of size and brightness, tonight’s full Moon is designated a supermoon, although perhaps the “super” is overstated because it will be only a few percent larger and brighter than the average full Moon. However, our Moon will fade to a dim red because it will also undergo a total lunar eclipse — an episode when the Moon becomes completely engulfed in Earth’s shadow. The faint red color results from blue sunlight being more strongly scattered away by the Earth’s atmosphere. Tonight’s moon can also be called a Harvest Moon as it is the full Moon that occurs closest to the September equinox, a time signaling crop harvest in Earth’s northern hemisphere. Total eclipses of supermoons are relatively rare — the last supermoon lunar eclipse was in 1982, and the next will be in 2033. Tonight’s supermoon total eclipse will last over an hour and be best visible from eastern North America after sunset, South America in the middle of the night, and Western Europe before sunrise. Live Feed from NASA: Supermoon Eclipse 2015
中文翻譯:
今晚，一輪明亮的滿月將會變成紅色。今晚的月亮特別明亮，因為它正處於其橢圓軌道中離地球相對較近的完全曬亮階段。事實上，根據某些尺寸和亮度的衡量標準，今晚的滿月被稱為超級月亮，儘管“超級”這個稱號可能有些誇張，因為它僅比普通滿月大和亮幾個百分比。不過，我們的月亮將會因為經歷一個完全月蝕而變得昏暗紅色——這是一個月亮被地球的影子完全覆蓋的過程。微弱的紅色來自於藍色陽光被地球大氣層更強地散射遠離。
今晚的月亮還可以稱為收穫月，因為它是發生在九月春分點最近的滿月，這是一個標誌著北半球作物收割的時期。超級月亮的完全月蝕相對罕見——上一次的超級月亮月蝕發生在1982年，下次將會在2033年。今晚的超級月亮完全月蝕將持續超過一小時，最佳觀賞時間是東北美洲的日落後，中南美洲的半夜，以及西歐的日出前。
#超級月亮 #滿月 #月蝕 #收穫月 #天文現象 #NASA直播
來源:NASA每日圖片
