Harmony Station hangs at the Earth–Moon L1 point, 326,000 km from Earth and close enough to the Moon that the Moon stops looking like sky and starts looking like a wall. It is one structure: a stationary central hub, and three concentric rings that rotate around it as a single piece, once every forty-five seconds. The farther out you live, the heavier you are.
This page shows the structure — the rings, the spokes, the gravity. The interiors you'll have to walk yourself.
Gravity is geography
Spin gravity is simple and merciless: it grows with the radius. At the hub there is none. At the Inner Ring you weigh a fifth of yourself. At the Middle Ring, half. Only the Outer Ring — a full kilometre across — pulls like Earth. Where you can afford to stand determines how much you weigh.
No ring connects to another. Every journey between rings goes up a spoke, through the weightless hub, and down again — and because the hub doesn't rotate, the elevator cabin has to shed its spin on the way up before it can dock. There is no such thing as a casual visit to another ring.
The numbers
Where
Earth–Moon L1 · 326,000 km from Earth, 58,000 km from the Moon. The Moon looms four times wider than it ever looks from Earth. Earth is a blue disc you can cover with your thumb.
Spin
1.34 rpm. From any window, Earth appears to turn once every forty-five seconds. It's the station turning. It looks like Earth anyway.
Who
About 4,200 people, three years into a station built for 6,500 — run as neutral territory by Earth, Luna, and the African Continental Alliance.
Getting there
Four to five days by cycler ship from Earth. The comm lag home is 2.2 seconds round trip — long enough to make every call feel like a letter.
Made of
Lunar aluminum and lunar concrete, twelve years in the building. Not chosen for elegance — chosen because Luna's mass driver launches it at 4% of Earth's energy cost.
Design philosophy
Resilience over efficiency. Repairability over optimization. It is not finished, and it isn't meant to be.
Five places worth knowing
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The zero-g poolHub · 0 g
A sphere of water held together by nothing but surface tension. One of the most disorienting and beautiful things on the station.
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The Float CaféInner Ring · 0.18 g
Drinks in squeeze bottles, food that won't float away, and the best hub view on the station through the ceiling viewport. Unwritten rule: no work talk during Earth-rise.
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The WalkwayMiddle Ring · 0.5 g
Eight metres wide and 1,570 metres around — a ten-minute circuit of the whole ring, with a running track down the middle. Clockwise only. Rule-breakers learn why.
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The Command CorridorMiddle Ring · 0.4 g
Senior leadership, diplomatic suites, Earth-view windows placed with intent. The kind of corridor where you slow down without deciding to.
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The Ring 3 gymOuter Ring access zone · 1.0 g
Full Earth gravity for those who need it. Newly opened, equipment still new — except one cable machine with a "maintenance scheduled" tag nobody has followed up on.
The station is where Exile to Harmony Station begins — and it's not a backdrop. It changes across every book, the way the people do.