Transit Instruments,Paris Observatory
Numéro d’image : 11599739
| Transit instruments were pivoted telescopes that allowed astronomers to time the passage of a star over the meridian (an imaginary line through the poles). As the heavens rotated,an astronomer would look through the transit telescope (aligned in the meridian) and note when a particular star crossed his field of vision. At the precise moment that the star passed,the astronomer noted the time via the ticking of a nearby astronomical regulator,an accurate clock used specifically for timing these transit observations. Without such measurements,the transit instrument wasn't able to do its job. A Mural Circle is an instrument used before the invention of the telescope to measure the angle above the horizon of astronomical objects as they crossed the meridian. Coloured engraving from 'The Heavens' by Amedee Guillemin,Publ. Richard Bentley,1878 | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Parker, David |
| Taille de l’image : | 6863 px × 4522 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €