ili:i51612
http:| rdf: | type | Concept |
| skos: | definition | a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror |
External links
| ∴dns: | linked concept | en:Cassegrainian telescope • Gregorian telescope |
Other
| Source | http: |