Thu 17 September · Lisbon
A dark-sky window opens.
Properly dark 21:11–05:50 · 8h 40m
waxing crescent · 40% lit · 6h 52m of moon-free darkness
How we’d play it
A genuinely dark window — galaxies and nebulae are on the menu, and Saturn and Mars are well-placed for the eyepiece. The kind of night we plan a full session around.
Plan a night with us →Worth looking at
- SaturnBest 02:36High around the middle of the night (around 02:36) — 54° in the south.
- MarsBest 05:50Well-placed in the east — 40° just before dawn (05:50), still rising as the sky brightens.
- JupiterBest 05:50Low in the east, still climbing when the sky brightens at 05:50 — only 18°.
- VenusBest 19:41Low in the southwest — 12° as darkness falls (19:41), then dropping, a bright twilight object.
Twilight stages & sun times +
- Sunset19:41
- Civil twilight ends20:08
- Nautical twilight ends20:39
- Fully dark21:11
- First light05:50
- Nautical twilight (dawn)06:22
- Civil twilight (dawn)06:54
- Sunrise07:20
All times WEST (local). Moon-free windows: 22:58–05:50.
Not tonight?
Darker nights suit galaxies and nebulae. The Moon thins out toward the end of the week.
Coming up
- Orionids meteor showerWed 21 October · Peak night. Halley’s Comet again, ~20/hour.in 5 weeks
- Leonids meteor showerTue 17 November · Peak night. Fast and bright, ~15/hour.in 9 weeks
- Geminids meteor showerMon 14 December · Peak night. The year’s best — up to ~120/hour, bright and slow.in 13 weeks
- Quadrantids meteor showerSun 3 January · Peak night. Sharp peak, up to ~40/hour — brief but rich.in 15 weeks
Show full detail
We bring the telescope, and we read the sky for you — so the night lands on the right hour.
Get in touch →