2026
CancelledAOAC 2026 was cancelled before the Open Round due to sudden, unforeseen circumstances. No rounds were held, so there are no papers, keys or results to archive for this season. We are sincerely sorry to everyone who registered.
Competition Archives
AOAC Archive
A permanent record of AOAC seasons, from official problem statements to post-competition editorials. Each season is added here once grading and publication are complete.
OAC 2025 Archive
Before AOAC, the competition existed as the Online Astronomy Competition (OAC). This archive contains the full materials from the 2025 season.