A Solstice Night in Paris
Image Credit & Copyright: Loic Michel
Explanation: The night of June 21 was theshortest night for planet Earth's northern latitudes, so at latitude 48.9degrees north, Paris was no exception. Still, the City of Light had anexceptionally luminous evening. Its skies were flooded with silvery nightshining or noctilucent clouds after the solstice sunset. Hovering at the edgeof space, the icy condensations on meteoric dust or volcanic ash are still infull sunlight at the extreme altitudes of the mesophere. Seen at high latitudesin summer months, stunning, wide spread displays of northern noctilucent cloudsare now being reported.
巴黎的夏至夜
6月21日的夜晚是地球北回歸線以北地區(qū)時(shí)長(zhǎng)最短的一個(gè)夜晚，位于北緯48.9度的巴黎也不例外。盡管如此，這座光明之城仍然異常明亮。在夏至當(dāng)天日落后，天空中布滿了銀色的夜光云。流星塵或火山灰上的冰冷凝結(jié)物懸浮在太空邊緣，它們位于中氣層最大高度的強(qiáng)烈陽光之下。在夏季的高緯度地區(qū)，我們可以看到引人注目且廣泛分布的北方夜光云。
參考文獻(xiàn)：
https://apod.nasa.gov/apod/image/1906/D7X7411-2Loic.jpg
近期文章：
Astronomy Picture of the Day——雪茄星系的中央磁場(chǎng)
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