Hikaru Hoshino - Seiyako
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The amount of starlight in the night sky. Usually, the total brightness of all stars in a 1° x 1° square of the sky is converted to the number of stars of magnitude 10 and expressed in units of S 1 (/0). The brightness of starlight varies depending on the position on the celestial sphere; for example, in the direction of the center of the galaxy, it is about 1000S 1 (/0). Source : Heibonsha Encyclopedia About MyPedia Information |
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夜天光のうち星の光によるもの。ふつう空の１°×１°四方の中のすべての星の明るさの総和を10等星の個数に換算し，S1(/0)を単位として表す。星野光の明るさは天球上の位置によって異なり，たとえば銀河中心の方向では約1000S1(/0)。
出典 株式会社平凡社百科事典マイペディアについて 情報 |
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