Assertion: butterfly nebula | /r/HasAspect | bipolar structure
Facets:
value: with two essential projections
type: OTHER
value: with two primary lobes
type: OTHER
Source sentences:
text: The Butterfly Nebula has a bipolar structure with two primary lobes and possibly another pair of lobes from an earlier phase of mass loss.
text: The Butterfly Nebula has a bipolar structure with two essential projections and conceivably another pair of flaps from a prior period of mass loss.