try to remember

[image]

isana:

vmconverter:

atorioum:

nemoi:

masproduction:

jacony:

APOD: 2009 December 20 - Tutulemma: Solar Eclipse Analemma

この画像は、「アナレンマ」と呼ばれるもので、同時刻の1年間の太陽の動きを示したもの。つまり、この写真は一年間、同じ時間に同じ画角で写真を撮り続けた画像を合成してやっと得られるもの。しかも、この写真はそのうちの一枚が皆既日食のど真ん中に来ている。これはすごい。

21 December 2009 • reblog: jacony • sky

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