天王星の日面通過 (海王星)
1. Transit of Uranus from NeptuneA transit of Uranus from Neptune occurs when Uranus passes directly between the Sun and Neptune. Uranus can then be seen from Neptune as a small black disk edging slowly across the disk of the Sun. A central transit lasts about 42 hours.
Read “Transit of Uranus from Neptune” on English Wikipedia
Read “天王星の日面通過 (海王星)” on Japanese Wikipedia
Read “Transit of Uranus from Neptune” on DBpedia
Read “Transit of Uranus from Neptune” on English Wikipedia
Read “天王星の日面通過 (海王星)” on Japanese Wikipedia
Read “Transit of Uranus from Neptune” on DBpedia
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