After the successful soft landing of Chandrayaan-3 on the south pole of the moon, preparations are on for Sun mission Aditya L1. The Indian Space Research Organization (ISRO) has announced that the mission will be launched on September 2 at 11 am from the Satish Dhawan Space Center in Sriharikota, Andhra Pradesh. The distance of the Sun from the Earth is 14 lakh kilometers, which means it is 4 times more distant than the Moon. Many missions have been launched earlier also, but there is so much heat on the sun. Because of this the mission could not be successful. It is clear from this that Mission Sun is going to be more difficult than Mission Moon, for this ISRO will have to do many times more preparations. In such a situation, various questions would be arising in people’s mind regarding things like the size and temperature of the sun.