Assertion: black hole | /r/HasProperty | unique
Facets:
value: according to hubblesite.org
type: OTHER
Source sentences:
text: However, because a black hole is so unique in how it operates, the matter wouldn't achieve those conditions in any other way, so it kind of is, except it's not.
text: According to hubblesite.org, all black holes are unique and often look very different from each other yet remain fundamentally identical.