The Essential Guide to Astronomy
I am a retired Principal of a college in Kolkata, India, and a sky-watcher since 1967. I am an M.SC. in Physics and Ph.D. (Sc) from Calcutta UNiversity. I possess a Celestron 8 and use it at times for sky watching.
August 27, 2016
May 10, 2016
Aurora & Atmospheric
May 2, 2016