51.4769° N   0.0005° W  /  ALT 0°00′
Est. under the same stars, 1881

We keep the
dark alive.

A working observatory and a cathedral for the night — where the oldest light in the universe still arrives on time, every clear evening, for anyone who looks up.

Descend into the dark
13.8BYears of light, nightly
I.
The vigil

Every photon that reaches our mirror left its star before there were eyes to receive it. Some travelled a hundred thousand years to end its journey on your retina, tonight, here.

We do not own the sky. We only keep the room dark enough, and the glass clean enough, that it can still be witnessed the way it was meant to be — slowly, in silence, with your own eyes.

Rising tonight

What the dome will hold

Live from the all-sky camera. Visibility: exceptional. Moon: 8% waning.
CON · 01

Orion

The hunter clears the eastern wall at 21:40. Look for the nebula's faint breath beneath the belt.

RISE 21:40 · MAG −1.2
CON · 02

Cassiopeia

Her crooked throne never sets from here — a W of cold fire wheeling slowly around the pole.

CIRCUMPOLAR · MAG 2.2
CON · 03

Lyra

Vega burns blue-white at the zenith — the second-brightest star our northern summers are given.

TRANSIT 23:10 · MAG 0.0
The instrument

A two-tonne eye, balanced on a hair

"The dome turns so quietly you'll hear the cables sing before the floor moves beneath you."

Plan your descentCome and look up.

Public viewing nights run every clear evening from dusk. Numbers are kept small — the dark is a shared, fragile thing.

Reserve a viewing →
ViewingsDusk – late, clear nights
The walkLantern-lit, no torches
Capacity24 per dome
WhereRidgeway Hill
Coordinates51.47°N 0.00°W