USA Astronomy and Astrophysics Olympiad (USAAAO) 2027

USAAAO promotes astronomy and astrophysics across the country through resources, online training and selection tests. Volunteers train the team by weekly video calls over the summer. At IOAA 2026 in Vietnam the U.S. team won 3 gold medals, 1 bronze and an honorable mention; at IOAA 2025 in Mumbai a U.S. student was the absolute winner. Past exams and solutions are posted on the site.