Published - January 06, 2026 11:13 am IST - Bengaluru ISRO to launch Aditya-L1, the first space-based Indian observatory to study the Sun. File | Photo Credit: ANI On the second anniversary of India’s maiden solar mission, Aditya-L1 reaching the Lagrangian point (L1), the Indian Space Research Organisation (ISRO) on Tuesday (January 6, 2026) made the Announcement of Opportunity (AO) soliciting proposals for the first AO cycle observations. The Aditya-L1 spacecraft reached the L1 point on January 6, 2024, 127 days after it was launched on September 2, 2023, and since then has been making continuous and comprehensive observations of the Sun from the Sun–Earth L1 point.