Assertion: comet's surface | /r/HasProperty | dynamic place
Facets:
value: with vents
type: OTHER
value: incredibly
type: DEGREE
Source sentences:
text: The surface of Hale-Bopp's nucleus must be an incredibly dynamic place, with 'vents' being turned on and off as new patches of icy material are rotated into sunlight for the first time," said Harold Weaver, a Johns Hopkins University astrophysicist who led the Hubble study.