Petrus Apianus - Astronomicum Caesareum - Ingolstadt, 1540 Volvelle - medieval instrument consisting of a series of concentric rotating disks, used to compute the phases of the moon and its position in relation to that of the sun
Swan nebula - Adam Ferris #adamferris #nebula #space #astronomy #art #pretty
Rosette Nebula in RGB & HA
Chandra Cartwheel Galaxy
Spiegazione della Carta Istorica dell'Italia: Time represented as landscape. Rewards detailed examination.