Assertion: astronomer | /r/CapableOf | observe system
Facets:
value: from birth
type: TEMPORAL
value: to death
type: TRANSITIVE-OBJECT
value: entirely
type: DEGREE
Source sentences:
text: Unlike most other fields of science, astronomers are unable to observe a system entirely from birth to death; the lifetime of worlds, stars, and galaxies span millions to billions of years.