明暗境界線
1. Terminator (solar)A terminator, twilight zone or "grey line" is a moving line that separates the illuminated day side and the dark night side of a planetary body. A terminator is defined as the locus of points on a Moon or planet where the line through a Sun is tangent.
Read “Terminator (solar)” on English Wikipedia
Read “明暗境界線” on Japanese Wikipedia
Read “Terminator (solar)” on DBpedia
Read “Terminator (solar)” on English Wikipedia
Read “明暗境界線” on Japanese Wikipedia
Read “Terminator (solar)” on DBpedia
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