Today, Dec. 20, 2025, the moon is 0 days old and is in the New Moon phase of its lunar cycle. It is 0% illuminated.

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under ...

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During such a busy stretch for stargazing, it can be hard to keep track of all that’s happening in the solar system, including what we can see from our backyards. On Monday night, Aug. 11, the moon ...

Moon phases reveal the passage of time in the night sky. Some nights when we look up at the moon, it is full and bright; sometimes it is just a sliver of silvery light. These changes in appearance are ...