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 ...

While orbiting Earth, the moon undergoes a series of phases, each marked by its unique appearance in the sky The moon has captivated humanity since the beginning of time, but what deeper significance ...

A rocket now in lunar orbit is holding some very precious cargo, with University of Delaware ties, that will help scientists better understand what it will take to successfully land on — and ...

The biggest stories of the day delivered to your inbox.

The biggest stories of the day delivered to your inbox.

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.