Because the Earth is doing the work of increasing the Moon's momentum, the Earth's rotation slows down in turn, as its momentum goes to the Moon. To put it another way, as the Moon's orbital momentum ...

What is the moon phase today? Today, Sept. 21, 2025, the moon is 29 days old and is in the New Moon phase of its lunar cycle. It is 0% illuminated. Moon phase Date First Quarter Aug. 31 Full Moon Sept ...