Assertion: star's distance | /r/HasProperty | measured
Facets:
value: to described in article
type: OTHER
value: in the hour angle system
type: OTHER
value: westward)
type: OTHER
value: from a fixed meridian
type: OTHER
Source sentences:
text: Instead, distances in space are measured using the speed of light.
text: The system of coordinates described in article (b) is seen to be similar, to that described in article (a) with this difference, that in the hour angle system, the angular distance along the equator is measured (westward) from a fixed meridian, whereas in the right ascension system the angular distance along the equator is measured (eastward) from the vernal equinox, which is a point on the celestial equator that rotates with the celestial sphere.