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45㎝の口径、120倍の眼視で見た中心部の色彩は青から緑系、その周りの90°角の曲がり辺は赤く感じる。中心部はガスの濃淡が複雑で見飽きません！
M42 45 cm telescope, x120 the color of the central part is blue to green, and the 90 ° angle around it feels red. In the center, the shade of gas is complicated and its nice view!