Assertion: comet | /r/HasAspect | role
Facets:
Source sentences:
text: Comet Encke (and Biela's Comet) had a role in scientific history in the generally discredited concept of luminiferous aether.
text: Biela's Comet (and Comet Encke) had a role in the now-discredited concept of luminiferous aether: its orbit was found to be shrinking in size, which was ascribed to the drag of an ether through which it orbited.