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2012-08-18 太空边缘的夜光云
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dailyas...@gmail.com
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Aug 18, 2012, 9:00:58 AM
8/18/12
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夜光云或夜耀云会位在太空的边缘。当从地面看出去,太阳已经没入地平面时,离地面大约80公里高的冰晶云,仍然持续反射阳光形成了夜光云的景致。这些通常出现在夏季高纬度地区的透明云彩,也常被称为是极区中气层云 (polar mesospheric clouds),它们的出现也许和低层大气的全球气候变迁有关。上面这幅静谧的影像,上个月摄于瑞典滨海的Vaxholm镇,当时在近子夜时分时,美丽的夜光云高悬在水面上空。
内容提供:
http://apod.nasa.gov/apod/ap120818.html
中文翻译:成功大学物理学系 苏汉宗,陈昭敏 等
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