Assertion: mirror | /r/HasProperty | aligned the thickness of a human hair
Facets:
value: to 1/10,000th
type: OTHER
Source sentences:
text: Lee Feinberg, Webb Optical Telescope Element Manager at NASA Goddard explains, "Aligning the primary mirror segments as though they are a single large mirror means each mirror is aligned to 1/10,000th the thickness of a human hair.