Assertion: reflecting telescope's mirror | /r/HasProperty | light
Facets:
value: quite
type: DEGREE
value: in weight
type: OTHER
Source sentences:
text: Mirror are quite light-in-weight, so the overall weight of the system is less than the other one.
text: The bigger the mirrors or lenses, the more light the telescope can gather.
text: The secondary mirror of the reflector blocks some of the light coming into the tube which reduces the effective aperture.