0+
Teams in Cosmic Quest
STEM October Astronomy Club presents
Global Astronomy
& Astrophysics Challenge
GAAC is an international team competition for students who can connect astronomy, astrophysics, and observation into precise scientific reasoning.
Registration opens on 12 July 2026.
0+
Participants
0+
Countries represented
0
Teams reach knockouts
Competition Format
Individual qualification, then collaborative knockouts.
Individual Qualification
Each participant competes individually for 1 hour across 40 multiple-choice questions. The three scores are combined, and the top teams advance to Round 2.
Team Challenge
Teams solve 10 problem-solving questions together: 3 Observational Astronomy, 4 Astrophysics, 2 Cosmology, 1 Planetology. Submitted as a single team response.
Final Results & Certificates
Winners are announced and all participants receive certificates of achievement.
GAAC Pages
Explore the challenge.
Ambassador Program
Become a GAAC Ambassador.
Represent your school or region, help grow the community, and earn recognition for spreading the word. Ambassadors who drive successful registrations climb the leaderboard and gain exclusive access.
Apply Now
Organized By
STEM Astronomy Club
GAAC continues the club mission of making astronomy and astrophysics more accessible, rigorous, and international for ambitious students.
Visit the main club website →