First Quarter Moon visible on June 21

On Sunday, June 21, the Moon reaches its First Quarter phase, with about 54 % of its surface illuminated. Observers can view the Mare Fecunditatis, Serenitatis and Crisium with the naked eye, while binoculars reveal additional craters such as Endymion and Posidonius. Telescopes expose further details like the Linne Crater, Descartes Highlands and Rupes Altai.

The next full Moon is expected on June 29, concluding the current lunar cycle that repeats approximately every 29.5 days.