Terrell | Roden Crater: Transforming a Dormant Volcano into an Astronomical Instrument

The crater of an extinct volcano is reshaped into a nearly perfect bowl. The curve of the bowl's rim is precisely calculated so that when one lies in the center and looks up, the sky appears as a slightly depressed dome rather than an infinite flat plane—this is the visual illusion of a "celestial vault." A series of tunnels and rooms are excavated within the volcanic body, each aligned with specific celestial events: one tunnel is penetrated by moonlight only once every eighteen years. Materials include polished volcanic rock, concrete, and a small amount of bronze. The ground surface is reddish-brown volcanic cinders. Aerial shot at dusk or shot from the rim of the bowl, clearly showing the bowl shape of the crater and its relationship with the sky. Avoid: irregular bowl rim, adding railings and walkways, general windows in internal spaces, surrounding buildings.

Translated from Chinese by AI.

一座死火山的火山口被重新塑形成一個近乎完美的碗,碗緣的曲線經過精確計算,讓人躺在中央往上看時,天空會呈現一個微微下壓的圓頂而不是無限的平面——這是「天空穹頂」的視覺錯覺。火山體內部開鑿出一系列隧道與房間,各自對準特定的天體事件:某條隧道每十八年才會被月光貫穿一次。材質為打磨的火山岩、混凝土與少量的青銅。地表為紅褐色的火山渣。黃昏空拍或從碗緣拍攝,火山口的碗形與天空的關係清楚。避免:碗緣不規則、加設欄杆與步道、內部空間開一般窗戶、周圍有建物。