The Promotion of Academic Olympiads and Development of Science Education Foundation under the Patronage of Her Royal Highness Princess Galyani Vadhana, in cooperation with Ministry of Education, Chiang Mai University, National Astronomical Research Institute of Thailand, and the Thai Astronomical Society, would like to welcome everyone to the 1st International Olympiad on Astronomy and Astrophysics 2007, held in Chiang Mai, Thailand on 30 November to 9 December 2007, to commemorate His Majesty the King's 80th Birthday Anniversary and Her Royal Highness Princess Galyani Vadhana's 84th Birthday Anniversary.

There are 21 participating countries/regions. Here is the official list.

Student contestants stay at the UNISERV, Chiang Mai University. Leaders and observers stay at Lotus Pang Suan Kaew Hotel, situated on Huay Kaew Road, 2 kilometres from Chiang Mai University. Transportation is pre-arranged for participants.

Chiang Mai is usually regarded by Thais as one of the most pleasant provinces to live in, especially in wintry December. We hope everyone enjoy their stays here.

Student contestants take both theory and practical examination papers. The latter consists of two parts: observation and data analysis.

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