A starry night

A sky full of stars in Chiang Mai. The National Astronomical Research Institute of Thailand (Narit) and the Royal Thai Air Force organise the Astrophotography Marathon in Thailand's northern province. It is held to promote the International Year of Light. The United Nations Organisation for Education, Science and Culture (Unesco) has declared 2015 the International Year of Light to highlight the importance of light and optical technologies in people's lives, for their futures, and for the development of society. — Wichan Charoenkiartpakun