From September 18–27, the Moon progresses from first quarter to full, moving through and past the Sagittarius Teapot and highlighting features like Mare Imbrium, Copernicus, Tycho, and Aristarchus. September 19 features NASA’s International Observe the Moon Night. The autumn equinox occurs on September 22, as Deneb replaces Vega at the zenith. Algol’s eclipse is on September 24. Saturn nears its October 3 opposition, with its rings showing the Seeliger effect, while Neptune reaches opposition on September 26. Mars and Jupiter rise after midnight, Venus and Mercury are low at sunset, and Uranus and Neptune remain faint in the morning sky. https://skyandtelescope.org/astronomy-news/observing-news/this-weeks-sky-at-a-glance-september-18-27/