Transit of the Sun
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Also called a solar transit. When the inner planets (Mercury, Venus) are at inferior conjunction and their ecliptic latitudes coincide, they appear to pass over the surface of the Sun as small sunspots. This is called a solar transit, and occurs on average once every 7.5 years for Mercury, but is extremely rare for Venus, having not occurred since 1874 and 1882, and not until 2004. → Related items Source : Heibonsha Encyclopedia About MyPedia Information |
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日面通過とも。内惑星（水星，金星）が内合のとき，黄緯も一致すると，太陽面上を小黒点として通過していくように見える。これを太陽面通過といい，水星では平均約7.5年に１回起こるが，金星ではきわめてまれで，1874年，1882年のあと2004年まで起こらない。 →関連項目内合 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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