Ayubowan! (May you live long!)

International Astronomy Olympiad (IAO) is an international, annual academic event which includes an intellectual competition among students between the ages of 14 and 18 years. The intention of the competition is to develop imagination, creativity and independent thinking. IAO provides students with the opportunity to meet people with similar interest from across the globe.

We, Sri Lankans, are very honored that we had the opportunity to host the XXIII IAO. Contestants,  leaders, observers, and visitors from all over the world are warmly welcome to our beautiful island Sri Lanka, the Pearl of the Indian ocean. We hope that you will enjoy the event.









06 - 14 October 2018

Colombo, Sri Lanka


Dates to Remember

  • Opening Ceremony – 07th of October 2018
  • Theoretical Round – 08th of October 2018
  • Observational Round – 09th of October 2018
  • Practical Round – 11th of October 2018
  • Closing Ceremony – 13th of October 2018
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Organizing parties

Ministry of Science, Technology and Research

Sri Lanka Association for the Advancement of Science

Institute of Physics, Sri Lanka

University of Colombo

Arthur C Clarke Institute for Modern Technologies

Sri Lanka Planetarium