Assertion: celestial sphere | /r/HasProperty | centered on the observer
Facets:
value: on earth
type: LOCATION
Source sentences:
text: All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer.
text: Figure 1 depicts a celestial sphere centered on an observer on Earth.
text: The celestial sphere is an imaginary globe, centered on the observer, which allows him (or her) to visualize the positions of celestial objects in the sky in terms of their positions on the sphere.
text: Horizontal coordinates use a celestial sphere centered on the observer.