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Astro Photo Météo 53
- 16 avr. 2018
- 5 Min
Tornades solaires : les scientifiques avaient tout faux !
En étudiant avec des moyens modernes les tornades solaires découvertes au cours du XXesiècle, les astrophysiciens solaires ont découvert récemment qu'elles n'existaient pas. On s'accorde généralement à faire de Galilée le découvreur des taches solaires. L'observation du Soleil se poursuivant, les astrophysiciens vont ensuite se concentrer sur les observations de la couronne solaire que l'on pouvait voir lors des éclipses et aussi sur l'étude du spectre solaire au cours du XIX
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Astro Photo Météo 53
- 13 mars 2018
- 11 Min
Jupiter : la sonde Juno livre de sublimes images et la clé d'une énigme
Les données de la sonde Juno nous ont révélé la beauté spectaculaire des pôles de Jupiter. Elles nous permettent maintenant de comprendre les vents qui forment des bandes nuageuses en rotation différentielle et de résoudre l'énigme de leur profondeur. Il semble que nous devions à l'astronome Giovanni Domenico Cassini la découverte de la structure en bandes de la surface de Jupiter. Il est certain en tout cas qu'il a découvert — avec Robert Hooke — la Grande Tache rouge, ainsi
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