Visanu Euarchukiati is an astronomy enthusiast and a science historian. He is an active member of The Siam Society and the Chairperson of the Siamese Heritage Trust Committee. He graduated with a BSc (Eng) in Computing Science from Imperial College London and an MS in Computer Science from Florida Institute of Technology and has worked in several organisations. As an editor and author for the National Astronomical Research Institute of Thailand (NARIT), he produced a series of 9 Thai books on the history of astronomy. His two papers on the observations of the total solar eclipse of 6 April 1875 in Siam were recently published in Exploring the History of Southeast Asian Astronomy by Springer in 2021. He appears in NARIT’s video documentary commemorating the 1875 eclipse, recently published online on 4 April 2025. Visanu joined archaeoastronomy activities as an advisor for text, photography and video for NARIT’s History and Heritage of Astronomy Group.