Assertion: planet's star | /r/HasProperty | exhausted fusable hydrogen
Facets:
value: in their core
type: LOCATION
Source sentences:
text: In addition to these "true" stars, scientists have identified 11 brown dwarfs (objects not quite massive enough to fuse hydrogen), and four white dwarfs (extremely dense collapsed cores that remain after stars such as our Sun have exhausted all fusable hydrogen in their core and have shed slowly their outer layers).