Why is ISRO's Aditya-L1 solar mission not headed to the Sun? What is Lagrange Point 1, its destination?

Why is ISRO's Aditya-L1 solar mission not headed to the Sun? What is Lagrange Point 1, its destination?

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Aditya-Ll is India's first solar space observatory and will be launched by the PSLV-C57. It will carry seven different payloads to have a detailed study of the Sun.

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