The astrographic refractor at the Royal Observatory of Spain in Cadiz, used for the Cartes du Ciel mapping project in the 1800s.
Astronomy author and photographer Alan Dyer presents amazing sky sights
Astronomy author and photographer Alan Dyer presents amazing sky sights
The astrographic refractor at the Royal Observatory of Spain in Cadiz, used for the Cartes du Ciel mapping project in the 1800s.
The Amazing Sky