Galactic core · next 30 nights

Milky Way windows at Hudson

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 night14 Oct0.3 h of core visibility in darkness

Highest core altitude10°near 20:20

Usable nights1 / 30Moonlight and cloud still decide image contrast.

Computed local geometry

Core hours after astronomical twilight

10 Octnone1% moon

11 Octnone3% moon

12 Octnone7% moon

13 Octnone13% moon

14 Oct0.3 h20% moon

15 Octnone28% moon

16 Octnone37% moon

17 Octnone46% moon

18 Octnone55% moon

19 Octnone65% moon

20 Octnone74% moon

21 Octnone82% moon

22 Octnone89% moon

23 Octnone95% moon

24 Octnone98% moon

25 Octnone100% moon

26 Octnone99% moon

27 Octnone95% moon

28 Octnone89% moon

29 Octnone80% moon

30 Octnone70% moon

31 Octnone59% moon

1 Novnone47% moon

2 Novnone36% moon

3 Novnone25% moon

4 Novnone16% moon

5 Novnone9% moon

6 Novnone4% moon

7 Novnone1% moon

8 Novnone0% moon

20:20–20:40

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.