• The observing schedule for the period July 1 - October 31, 2021, has been released. [16/6/2021]





" The earth revolves about the sun in the circumference of a circle, the sun lying in the middle of the orbit, and the sphere of the fixed stars, situated about the same center as the sun, is so great that the circular orbit of the earth is as small as a point compared with that sphere [Aristarchus of Samos c. 270 BCE]."