Belogradchik Observatory
Videos
The Astronomical Observatory of Belogradchik or Belogradchik Observatory is an astronomical observatory owned and operated by the Institute of Astronomy of the Bulgarian Academy of Sciences. It is loc
Schmidt–Cassegrain telescope
Videos
The Schmidt–Cassegrain is a catadioptric telescope that combines a Cassegrain reflector's optical path with a Schmidt corrector plate to make a compact astronomical instrument that uses simple spheric
View of the corrector and primary mirror of a Schmidt–Cassegrain telescope.
People demonstrating a Schmidt–Cassegrain telescope manufactured by Celestron at a sidewalk gathering