Assertion: star's rotation | /r/HasProperty | based on one rotation of the earth
Facets:
value: for the purpose of practical astronomy
type: PURPOSE
value: on its polar axis
type: LOCATION
value: with respect to the vernal equinox
type: OTHER
Source sentences:
text: For the purpose of practical astronomy, the true rotation of the earth is based on one rotation of the earth on its polar axis with respect to the vernal equinox and is known as the sidereal day.