Artwork of refractor telescope that found Neptune
Numéro d’image : 11879796
| Refracting telescope. Artwork of the 23 centimetre (9-inch) Fraunhofer refractor telescope at Berlin Observatory,Germany,on 23 September 1846,the night that it was used to discover Neptune. German astronomer Johann Galle,aided by Louis D'Arrest,looked in a portion of the sky where the French astronomer Leverrier calculated a planet would be. This calculation was based on perturba- tions in the orbit of Uranus. Galle and D'Arrest compared the night sky to a new but unpublished star atlas,and within a few minutes found an unknown object just 1 degree from the predicted position. Observations the following night showed that it had moved,proving that it was a planet | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Baum, Julian |
| Taille de l’image : | 2800 px × 2175 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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