Prof. Dipankar Banerjee, Vice Chancellor, IIST, delivered the Fourth Krishna Warrier Memorial Lecture at Priyadarshini Planetarium, Thiruvananthapuram, on 11th January 2026, organised by the Aastro Kerala. 
The lecture, titled “Knowing Our Nearest Star, Aditya L1 & the Science of the Sun,” began with a historical perspective, tracing Galileo’s pioneering observations of sunspots and his detailed drawings that laid the foundation for modern solar physics. Prof. Banerjee explained how sunspots play a key role in predicting space weather and why studying them is crucial for safeguarding satellites, communication systems, and power infrastructure on Earth.
He then highlighted the significance of India’s Aditya-L1 mission, explaining how its unique vantage point enables continuous observation of the Sun. The scientific objectives of the mission and the role of its various payloads were also clearly explained, showing how each instrument contributes to studying the Sun’s atmosphere, solar wind, and magnetic activity.
Following the talk, an enthusiastic audience spanning age groups from 8 to 80 years participated in a lively question-and-answer session, raising thought-provoking questions. The event concluded with a live solar projection onto a wall, arranged by Aastro Kerala volunteers, allowing participants to safely observe the Sun, followed by a photo session that captured the excitement and curiosity sparked by the session.
The lecture was a memorable celebration of astronomy, blending history, science, and hands-on observation for audiences of all ages.