Galactic core · next 30 nights

Milky Way windows at Roque de los Muchachos (La Palma)

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 night10 Oct1.3 h of core visibility in darkness

Highest core altitude21°near 21:20

Usable nights24 / 30Moonlight and cloud still decide image contrast.

Computed local geometry

Core hours after astronomical twilight

10 Oct1.3 h0% moon

11 Oct1.3 h2% moon

12 Oct1.3 h6% moon

13 Oct1.0 h12% moon

14 Oct1.0 h18% moon

15 Oct1.0 h26% moon

16 Oct1.0 h35% moon

17 Oct1.3 h44% moon

18 Oct1.3 h53% moon

19 Oct1.0 h63% moon

20 Oct1.0 h72% moon

21 Oct1.0 h80% moon

22 Oct1.0 h88% moon

23 Oct1.0 h94% moon

24 Oct0.7 h98% moon

25 Oct0.7 h100% moon

26 Oct0.7 h99% moon

27 Oct0.7 h96% moon

28 Oct0.7 h90% moon

29 Oct0.3 h82% moon

30 Oct0.3 h72% moon

31 Oct0.3 h61% moon

1 Nov0.3 h49% moon

2 Nov0.3 h38% moon

3 Novnone27% moon

4 Novnone18% moon

5 Novnone10% moon

6 Novnone5% moon

7 Novnone2% moon

8 Novnone0% moon

21:20–22:40

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.