Il nord incontra il sud
Guardare questa foto potrebbe farti sentire un po' sottosopra! Questa foto della settimana cattura sia l'emisfero settentrionale che quello meridionale in una sola volta - l'intero cielo della notte in un'immagine che fa girare la testa - qualcosa che sarebbe impossibile da vedere nella vita reale.
Per creare questa immagine, i fotografi Petr Horálek e Juan Carlos Casado hanno scattato due foto in osservatori situati alle stesse latitudini negli emisferi nord e sud. La metà superiore è una foto scattata all'osservatorio Roque de los Muchachos dell'Instituto de Astrofísica de Canarias a La Palma nelle isole Canarie, 29 gradi a nord dell'equatore, mentre la metà inferiore è stata scattata all'osservatorio La Silla dell'ESO nel deserto di Atacama in Cile, 29 gradi a sud dell'equatore. Quando vengono unite digitalmente, creano una vista continua del cielo notturno.
Una delle caratteristiche più evidenti in questa immagine è l'inquietante bagliore bianco che si irradia verticalmente dal suo centro. Si tratta della luce zodiacale, un fenomeno causato dalla polvere che pervade il nostro sistema solare che disperde la luce solare, visibile solo in aree con cieli estremamente bui e privi di inquinamento luminoso. A brillare nel fascio di luce zodiacale dell'emisfero settentrionale è il pianeta Venere.
L'immagine in basso mostra diversi telescopi a La Silla, incluso il telescopio Schmidt da 1 metro dell'ESO in primo piano. Lo specchio riflettente visto al contrario nell'immagine in alto fa parte del Cherenkov Telescope Array (CTA), un gruppo di telescopi a raggi gamma che osservano alcuni dei fenomeni più energetici dell'universo. Un secondo array sarà installato nell'emisfero meridionale vicino all'Osservatorio Paranal dell'ESO, attraverso un accordo tra l'osservatorio CTA e l'ESO.
Link:
Versione proiettata equirettangolare di questa immagine
Versione interattiva a 360º di questa immagine
Versione proiettata sferica di questa immagine
Crediti:P. Horálek & J. C. Casado / ESO
A proposito dell'immagine
| Identificazione: | potw2137a |
| Lingua: | it |
| Tipo: | Fotografico |
| Data di pubblicazione: | Lunedì 13 Settembre 2021 06:00 |
| Dimensione: | 15406 x 23519 px |
A proposito delll'oggetto
| Nome: | La Silla, Milky Way, Roque de los Muchachos Observatory |
| Tipo: | Unspecified : Sky Phenomenon : Night Sky : Milky Way Unspecified : Technology : Observatory |
Formati delle immagini
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