Assertion: metric system's unit | /r/ObjectUse | used as light years
Facets:
value: often
type: TEMPORAL
value: in various disciplines
type: LOCATION
Source sentences:
text: Instead, non-metric units are used, such as the solar radius, astronomical units, light years, and parsecs; the astronomical unit is mentioned in the SI standards as an accepted non-SI unit.
text: In science, metric use is essentially universal, though additional specialized units are often used for specific purposes in various disciplines (such as the parsec and light year in astronomy), consistent with worldwide use.