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地球の日面通過 (火星)
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1. Transit of Earth from Mars​A transit of Earth across the Sun as seen from Mars takes place when the planet Earth passes directly between the Sun and Mars, obscuring a small part of the Sun's disc for an observer on Mars. During a transit, Earth can be seen from Mars as a small black disc moving across the face of the Sun. A central transit may last up to 10 hours, although this is extremely rare (the last time it happened was in 2277 BC, and the next one is in 5003 AD).
Read “Transit of Earth from Mars” on English Wikipedia
Read “地球の日面通過 (火星)” on Japanese Wikipedia
Read “Transit of Earth from Mars” on DBpedia

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