In this talk I describe the physical properties of the sun and energy generation in brief. Then I talk about
the various surface features such as granules, super-granules, sunspots and activities that follows the sunspots. I also describe the chromosphere, coronal features and explosive events in brief. Then I discuss the sunspot and magnetic cycle. The talk is of preliminary in nature.
Prof. Jagdev Singh has long association with ARIES earlier UPSO, since 1988 when the planning and execution for the first astronomical expedition to Antractica was started. Lead the first astronomical expedition, 3 member team consisting to Indian station in Antarctica in 1989. 1.He did his Ph. D. With Dr. M K V Vainu Bappu a well known astronomer in the year 1984 using the data obtained by him during the total solar eclipses in 1980 & 1983. 2.Planned and successfully executed 10 expeditions to make observations of the solar corona during the total solar eclipses of the Sun. 3. He planned, designed and proposed VELC mission on ADITYA-1 (first Indian mission (Solar Coronagraph) to observe the sun) expected to be launched in 2019 (Principal Investigator from 2006 to 2015).