Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telescope design
|
| gptkbp:advantage |
produces upright image
|
| gptkbp:category |
astronomer
|
| gptkbp:focusArea |
erect image
|
| https://www.w3.org/2000/01/rdf-schema#label |
Gregorian telescopes
|
| gptkbp:influenced |
gptkb:Cassegrain_telescope
|
| gptkbp:inventedBy |
gptkb:James_Gregory
|
| gptkbp:mirrorArrangement |
secondary mirror placed beyond primary focus
|
| gptkbp:namedAfter |
gptkb:James_Gregory
|
| gptkbp:predecessor |
gptkb:Newtonian_telescope
|
| gptkbp:proposedBy |
1663
|
| gptkbp:type |
astronomer
|
| gptkbp:usedFor |
gptkb:astronomy
terrestrial observations |
| gptkbp:uses |
concave primary mirror
concave secondary mirror |
| gptkbp:bfsParent |
gptkb:James_Andrew_Short
|
| gptkbp:bfsLayer |
6
|