Statements (28)
Predicate | Object |
---|---|
gptkbp:instanceOf |
telescope design
|
gptkbp:advantage |
reduced off-axis optical errors
|
gptkbp:category |
astronomer
|
gptkbp:corrects |
coma
spherical aberration |
gptkbp:establishedIn |
early 20th century
|
gptkbp:fieldOfView |
wide
|
https://www.w3.org/2000/01/rdf-schema#label |
Ritchey-Chrétien telescope
|
gptkbp:inventedBy |
gptkb:George_Willis_Ritchey
gptkb:Henri_Chrétien |
gptkbp:mirrorType |
two-mirror system
|
gptkbp:namedAfter |
gptkb:George_Willis_Ritchey
gptkb:Henri_Chrétien |
gptkbp:notableFeature |
compact design
no coma at focal plane |
gptkbp:opticalDesign |
gptkb:Cassegrain_reflector
|
gptkbp:primaryUse |
astronomer
|
gptkbp:usedBy |
amateur astronomers
professional observatories |
gptkbp:usedIn |
gptkb:Gemini_Observatory
gptkb:Keck_Observatory gptkb:Very_Large_Telescope gptkb:Hubble_Space_Telescope Canada-France-Hawaii Telescope |
gptkbp:usesPrimaryMirrorShape |
hyperbolic
|
gptkbp:usesSecondaryMirrorShape |
hyperbolic
|
gptkbp:bfsParent |
gptkb:Bicentennial_Hall_Observatory
|
gptkbp:bfsLayer |
5
|