Have you ever seen a face or shape of an animal in passing by clouds? This tendency of our perception to find structures within an image or a pattern, is called pareidolia (derives from Greek eidolon = picture). Essentially, this is a misperception where we see objects changing subjectively. But this can also be so much fun and inspire our fantasy to search for these shapes and to find them. Children, in particular, are known to be true masters of this game.
No, this is not about another sequel of the science fiction movie or whether Arnold Schwarzengger is planning a trip to the moon … It is more about an astronomical term, where »terminator« describes the day-night border of a celestial body. This is the visible border between the illuminated side and the dark side of the object, being the border between day and night on the celestial body. The word »terminator« derives from Latin »terminare« = conclude, restrict.
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