Astronomy, the oldest of natural sciences, has changed often throughout history depending on general knowledge, geographical region and culture. The earliest practitioners of astronomy were early ...

Ibn-al-shatir's lunar model from which Copernicus is reported to have borrowed in composing his cosmological model. Credit: This work is in the public domain in the ...

11 1/4"H x 17 3/4"W (sight) 19 3/4"H x 23 3/4"W ...