Assertion: telescope's mirror | /r/HasProperty | supported by actuator
Facets:
Source sentences:
text: Although other pre-existing telescopes such as the Nordic Optical Telescope had lightweight mirrors supported by actuators, the NTT is claimed to be the first telescope using full active optics.
text: The mirror is supported by a number of actuators (81 on the back and 24 around the edge), which allow its shape to be controlled by computers.