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We want truth. Today's trend is to deceive  others for self. In every aspect or every branch it is spread. To avoid this Astronomy is taken as one branch. Moreover  `India has  great culture since thousands of years.To retain its culture sky.com is created.（sunlight.astro.com）


At the time of equinoxes  21 March and21 Sept. of every year, in the earth the same parts of earth will be exposed  to the  sun,as they will be in same plan with the sun. But why the weather will be hot hot in21 March and cool cool in 21 September ?