Assertion: amateur astronomer | /r/CapableOf | contribute toward activity
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Amateur astronomers often contribute toward activities such as monitoring the changes in brightness of variable stars and supernovae, helping to track asteroids, and observing occultations to determine both the shape of asteroids and the shape of the terrain on the apparent edge of the Moon as seen from Earth.