| |||
| celestial horizon; rational horizon | |||
| datum surface | |||
| geometric horizon; geometrical horizon; true horizon | |||
| true level | |||
|
wahrer Horizont : 1 phrase in 1 subject |
| Optics branch of physics | 1 |
| |||
| celestial horizon; rational horizon | |||
| datum surface | |||
| geometric horizon; geometrical horizon; true horizon | |||
| true level | |||
|
wahrer Horizont : 1 phrase in 1 subject |
| Optics branch of physics | 1 |