Galactic core · next 30 nights

Milky Way windows at Hilo

This tracks the Sagittarius galactic core only when the Sun is at least 18° below the horizon and the core is at least 10° high. It is geometry, not a weather promise.

Best night5 Nov0.7 h of core visibility in darkness

Highest core altitude15°near 19:00

Usable nights11 / 30Moonlight and cloud still decide image contrast.

Computed local geometry

Core hours after astronomical twilight

2 Nov0.3 h33% moon

3 Nov0.3 h23% moon

4 Nov0.3 h15% moon

5 Nov0.7 h8% moon

6 Nov0.7 h3% moon

7 Nov0.7 h1% moon

8 Nov0.3 h0% moon

9 Nov0.3 h2% moon

10 Nov0.3 h5% moon

11 Nov0.3 h10% moon

12 Nov0.3 h16% moon

13 Novnone23% moon

14 Novnone31% moon

15 Novnone41% moon

16 Novnone50% moon

17 Novnone60% moon

18 Novnone70% moon

19 Novnone79% moon

20 Novnone87% moon

21 Novnone93% moon

22 Novnone98% moon

23 Novnone100% moon

24 Novnone99% moon

25 Novnone96% moon

26 Novnone90% moon

27 Novnone82% moon

28 Novnone72% moon

29 Novnone61% moon

30 Novnone49% moon

1 Decnone38% moon

19:00–19:40

This is the widest geometric window in the next month. Check the live forecast before travelling, then favor the darkest moonless portion. Check live cloud and transparency →

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Same coordinates, different question

Moon

Moonless nights

Find the longest uninterrupted dark windows.

Core

Milky Way

See when the galactic core clears the horizon after dark.

−18°

Astronomical darkness

Track true darkness, including polar twilight.