OBSERVATORY / UNITED KINGDOM
Royal Observatory Greenwich
Greenwich Park, London, United Kingdom
51.4778° N · 0.0014° W
Calculated for September 21, 2026 (Europe/London · UTC+01:00 at calculation).
Tonight's Moon
Waxing Gibbous · 74% illuminated
Moonrise 17:15 · Moonset 00:08
Times are for local date 2026-09-21.
The Moon image shows its phase, not its orientation in the local sky.
Facility-local time (Europe/London · UTC+01:00 at calculation). These are astronomical event times, not venue hours.
Visit information
Ticketed historic observatory and exhibition visits, not unrestricted night-time telescope access. The Peter Harrison Planetarium was listed as closed for renovation when checked; consult current notices.
Hours, prices, reservations and weather can change. Check the official venue information before travelling.
Record checked 2026-09-21. Source ↗ · Coordinate source ↗
The dark part of the night
Astronomical night is shown in separate facility-local intervals for 2026-09-21 evening through the following morning.
- 21:00 (UTC+01:00) — Sep 22 · 04:45 (UTC+01:00)
Moon-free intervals within that night:
- Sep 22 · 01:30 (UTC+01:00) — Sep 22 · 04:45 (UTC+01:00)
The chart shows astronomical twilight, Moon altitude and geometric planet positions. It does not describe venue access, weather, haze, light pollution or local obstructions.