Counterglow - Tainikisho (English spelling)
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Gegenschein is a vague, roughly elliptical patch of light that can be seen on the ecliptic, exactly opposite the sun, at midnight. Like the zodiacal light that appears after sunset and before sunrise, it is thought to be sunlight reflected by a cluster of tiny cosmic dust particles, but it is much fainter and therefore more difficult to observe. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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ゲーゲンシャイン Gegenscheinともいう。深夜，太陽と正反対の黄道上に見られる，ほぼ楕円形のぼんやりした光の斑点。日没後や日の出前に現れる黄道光と同じく，微細な宇宙塵の集団による太陽光の反射と考えられるが，はるかにかすかであるため観測は困難である。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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