Sky brightness across the selected night, dusk → dawn. Dashed lines mark
astronomical dark (Sun below −18°); the blue line is now.
🟢 Up right now
Tonight's timeline
Next nights
Narrowband
· moonlight OK
RGB / broadband
Year viewusable dark hours — darker = more. Outlined column is this week.
Built from your measured local horizon. “Usable” = above your obstructions and above
° altitude, during darkness. Previews are DSS2 survey cutouts framed to your
field of view (a framing check); “examples” links to real narrowband/RGB shots on AstroBin. Weather is
live from Open-Meteo. Times are your local time. Tap any target for details.
Astro darkness — this year
· local time, evening → morning
Each column is a night of the year; vertical is time. The dark core is astronomical
night (Sun below −18°) — at your latitude it never turns fully black around midsummer. Bright line = today; dashed = selected date.