自転と公転の同期
1. Synchronous rotationIn astronomy, synchronous rotation is a planetological term describing a body orbiting another, where the orbiting body takes as long to rotate on its axis as it does to make one orbit; and therefore always keeps the same hemisphere pointed at the body it is orbiting. Another way of describing it is that from the surface of the satellite, the main planet appears to be locked in place in the sky as it slowly rotates.
Read “Synchronous rotation” on English Wikipedia
Read “自転と公転の同期” on Japanese Wikipedia
Read “Synchronous rotation” on DBpedia
Read “Synchronous rotation” on English Wikipedia
Read “自転と公転の同期” on Japanese Wikipedia
Read “Synchronous rotation” on DBpedia
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