Radhakrishna BP. Galileo Galilei (1564-1642) The 400<SUP>th</SUP> Anniversary of the Invention of the Telescope Causing a Great Revolution in Astronomy. jgsi [Internet]. 2009 Oct. 1 [cited 2024 Sep. 21];74(4):429-31. Available from: https://geosocindia.com/index.php/jgsi/article/view/58777