The Moon is the brightest object in the night sky and the most common reason a technically clear night disappoints. Planning around it is easier than fighting it.
Phase is only half the story
A full Moon rises near sunset and stays up all night. A first-quarter Moon is high at sunset and sets around midnight, leaving the second half of the night dark. A last-quarter Moon rises around midnight and is gone by morning. For faint deep-sky objects, the last-quarter week often gives you a dark window after midnight without waiting for a new Moon.
Altitude beats illumination
A 70% Moon low in the west scatters less light into the eastern sky than a 40% Moon directly overhead. Check the altitude shown on the city page. If the Moon sets during your dark window, the moonless minutes figure tells you how much dark time remains.
Observe the Moon itself
Around first quarter, the terminator—the line between light and shadow—is the best place to look. Craters and mountain ridges throw long shadows there. A full Moon looks flat by comparison because sunlight hits it head-on. Any small telescope or 10x binoculars will show the difference.
Use Moonlight instead of cancelling
Bright nights are good for the Moon, planets, double stars, and bright open clusters. They are poor for the Milky Way and faint galaxies. Match the target to the sky rather than skipping the night entirely.
Look for earthshine
A few days after new Moon, the dark limb of the Moon can glow faintly from sunlight reflected off Earth. It is subtle with the naked eye and striking in binoculars. The best views come in twilight, before the sky is fully dark.
Sources and review
Updated October 21, 2026. Date-sensitive details can change.