Assertion: telescope's advantage | /r/HasSubevent | many proposed designs
Facets:
value: for reflecting telescopes
type: TRANSITIVE-OBJECT
Source sentences:
text: The potential advantages of using parabolic mirrors—reduction of spherical aberration and no chromatic aberration—led to many proposed designs and several attempts to build reflecting telescopes.
text: The potential advantages of using parabolic mirrors (primarily a reduction of spherical aberration with elimination of chromatic aberration) led to several proposed designs for reflecting telescopes, the most notable of which was published in 1663 by James Gregory and came to be called the Gregorian telescope, but no working models were built.