Assertion: asteroid's shape | /r/HasProperty | spectral
Facets:
Source sentences:
text: In 1973, astronomers Clark R. Chapman, David Morrison, and Ben Zellner developed a simple taxonomic system for asteroids based on color, albedo, and spectral shape.
text: In 1973, astronomers Clark R. Chapman, David Morrison, and Ben Zellner developed a simple taxonomic system for asteroids based on color, albedo, and spectral shape.