Assertion: telescope's aperture | /r/HasProperty | necessary
Facets:
value: at ground level
type: LOCATION
Source sentences:
text: To see the rings around Saturn, however, a 6- to 9-inch aperture will be necessary.
text: The larger the aperture, the less magnification is necessary at ground level, increasing the image quality.
text: To see the rings around Saturn, however, a 6- to 9-inch aperture will be necessary.