Galactic core · next 30 nights

Milky Way windows at Ali Observatory

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 night11 Oct1.3 h of core visibility in darkness

Highest core altitude19°near 21:40

Usable nights21 / 30Moonlight and cloud still decide image contrast.

Computed local geometry

Core hours after astronomical twilight

11 Oct1.3 h2% moon

12 Oct1.0 h5% moon

13 Oct1.0 h10% moon

14 Oct1.0 h16% moon

15 Oct1.0 h24% moon

16 Oct1.0 h32% moon

17 Oct0.7 h41% moon

18 Oct0.7 h51% moon

19 Oct0.7 h60% moon

20 Oct0.7 h69% moon

21 Oct0.7 h78% moon

22 Oct0.3 h86% moon

23 Oct0.3 h92% moon

24 Oct0.3 h97% moon

25 Oct0.7 h99% moon

26 Oct0.7 h100% moon

27 Oct0.3 h97% moon

28 Oct0.3 h92% moon

29 Oct0.3 h85% moon

30 Oct0.3 h76% moon

31 Oct0.3 h65% moon

1 Novnone53% moon

2 Novnone42% moon

3 Novnone31% moon

4 Novnone21% moon

5 Novnone13% moon

6 Novnone6% moon

7 Novnone2% moon

8 Novnone0% moon

9 Novnone0% moon

21:40–23:00

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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Keep planning

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.