Horologium Mirabile

Greenwich  Latitude: 51.47  Longitude: -0.01

Mobile geotagged access to local<br /> Astrolabe and Horologium<br /> with Planets, Stars and the Milky Way

Get an always updated and instant local view and mindfulness of our wonderful sky and planets

Horologium Onspot
Horologium Offspot


The Horologium is the Monumental Clock created in several European churches in the Middle Ages. It shows the position of planets, moon and sun and dawn and dusk.
For the Northern Hemisphere it is a stereographic projection from the celestial North pole. Therefore it can only project lower altitudes.The Horologium is intuitively more like a clock than the Astrolabe. The Astrolabe is for the Northen Hemisphere projected from the celestial South pole.
No responsibility is taken for present or upcoming errors. Please report
Sometimes local time and winter/summertime is incorrect due to database failure. Celestial coordinates should be correct