19th International Olympiad on Astronomy and Astrophysics (IOAA 2026)

The International Olympiad on Astronomy and Astrophysics (IOAA) is an annual international competition for high school students that promotes excellence in astronomy and astrophysics and fosters academic exchange. The 19th IOAA (IOAA 2026) will be held in Hanoi, Vietnam, with Phenikaa University serving as the main venue for academic competitions and central activities. The event brings together young astronomers and educators worldwide for competition, learning, and cultural exchange. IOAA is one of the twelve International Science Olympiads and represents a high level of academic competition for secondary-school students.

Open to high school students worldwide.

Registration is via the event registration form on the official IOAA 2026 website.