What to See Tonight:
As of May 21, 2026, the Moon is in its Waxing Crescent phase with 27% of its surface illuminated. Visible tonight are the Mares Crisium and Fecunditatis; use binoculars or a telescope to spot the Endymion Crater. The next Full Moon will occur on May 31. The lunar cycle consists of eight phases: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent. These phases result from the Moon’s 29.5-day orbit around Earth.