| Abstract: The International Olympiads in the sciences and mathematics aim to inspire and nurture young school students to embark on a scientific career, by offering them a unique intellectual stimulus, and providing uncommon opportunities of learning in a friendly competition. The International Olympiad on Astronomy and Astrophysics (IOAA) is an annual gathering of the most talented high school students from across the world to showcase their skills of problem solving in astronomy at a highly challenging level. India has been participating in the international astronomy Olympiads for nearly three decades, returning every year with a rich haul of medals. A national programme, anchored at the Homi Bhabha Centre for Science Education (TIFR), selects and trains the students through multiple levels of tests and training camps. India had the honour of hosting the 18th IOAA in Mumbai in 2025, the third occasion that the astronomy Olympiad came to India. We shall describe the overall academic programme of IOAA 2025, designed and developed by a team of Indian researchers, and implemented by a large body of professional astronomers, college and university teachers, amateur astronomers, and undergraduate students from across the country. A few illustrative examples from the tasks will provide a glimpse into the demanding nature of the competition, and how it focuses on creative thinking and problem solving skills essential in both theoretical and observational astronomy. We shall demonstrate how the Olympiad movement is a celebration of the very best in high school science, set in the context of modern advances in contemporary research. |
