National Science Day in Thailand is celebrated annually on August 18th to mark the anniversary of a total solar eclipse in 1868, which was forecasted by King Mongkut (Rama IV) two years earlier.
The day serves several purposes: to honor King Mongkut’s contributions to science as the “Father of Thai Science,” to foster a scientific culture and encourage public engagement with science, to promote and disseminate research and technological advancements, to strengthen collaboration between public and private sectors in applying science and technology for national development, and to provide a platform for researchers and inventors to showcase their work to the public.
History of National Science Day
On August 18th, 1868, King Mongkut witnessed a total solar eclipse at Wa Ko, Prachuap Khiri Khan, an event he had precisely predicted two years in advance. At that time, even Thai astrologers were hard to believe, as such an eclipse had never been recorded in Thailand before. To honor King Mongkut’s scientific foresight and his pioneering impact on science in Thailand, the Thai Government declared August 18th as National Science Day.
Since its inception in 1982, National Science Day has been celebrated annually across the country. The Ministry of Higher Education, Science, Research and Innovation along with other science-related and technological departments from both public and private sectors, organizes events to commemorate the day and promote scientific awareness. Since then, the event has grown in scale and evolved into “National Science Week.”
National Science Day Celebrations
People usually celebrate National Science Day by attending wreath-laying ceremonies and honoring His Majesty King Mongkut. Events also include exhibitions about the royal history and work of King Mongkut, activities promoting scientific work and various inventions, and visits to science museums. On a smaller scale, most schools in Thailand commemorate the day by hosting science fairs and other activities such as science project contests, student invention displays, and scientific experiment demonstrations.
This year, the Ministry of Higher Education, Science, Research and Innovation is also organizing the National Science and Technology Fair or NST Fair. Held every year, the event aims to inspire its visitors with fresh perspectives on science, technology, and innovation.
Princess Sirindhorn AstroPark
Princess Sirindhorn AstroPark is the headquarters of National Astronomical Research Institute of Thailand (NARIT), located in Chiang Mai, Thailand. This facility is dedicated to the advancement of astronomical research and public education and is named in honor of Her Royal Highness Princess Maha Chakri Sirindhorn. The park features cutting-edge telescopes and research facilities, along with interactive exhibits designed to engage visitors of all ages.
Opening Hours:
- Tuesday – Friday: 9 a.m. – 4 p.m.
- Saturdays, Sundays, Public holidays: 10 a.m. – 5 p.m.
Regional Observatories for the Public
Thaliand’s Regional Observatories for the Public are located in five provinces across Thailand: Khon Kaen, Nakhon Ratchasima, Songkhla, Chachoengsao, and Phitsanulok (under construction until 2026). These observatories are part of a national effort to bring astronomical knowledge and experiences closer to the Thai people, promoting interest in space science and technology. Each observatory features several sections, including an Astronomy Exhibition, a Fulldome Digital Planetarium, a Public Observatory, and Learning Areas Outside the Building.
Opening Hours:
- Tuesday – Sunday: 9 a.m. – 6 p.m.