Assertion: star's distance | /r/HasProperty | measured in right ascension system
Facets:
value: from the vernal equinox
type: TEMPORAL
value: eastward
type: OTHER
Source sentences:
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.