Yantrarāja is the Sanskrit name for the ancient astronomical instrument called astrolabe. It is also the title of a Sanskrit treatise on the construction and working of the astrolabe composed by a Jain astronomer Mahendra Sūri in around 1370 CE.[1]
^Sreeramula Rajeswara Sarma (1999). "Yantraraja: The Astrolabe in Sanskrit"(PDF). Indian Journal of History of Science. 34 (2): 145–158. Retrieved 21 December 2023.