Assertion: telescope's position | /r/CapableOf | coincide with a pair of faint blue stars
Facets:
value: by using the mark i
type: MANNER
Source sentences:
text: Among the objects catalogued was the first gravitational lens, which was confirmed optically in 1979 after its position was found to coincide with a pair of faint blue stars by using the Mark I as an interferometer with the Mark II.