1. Introduction, 1.1 Indian astronomy: a brief overview, 1.2 The Sarvasiddhantaraja, 'The King of all siddhantas', 1.3 The Goladhyaya in Nityananda's Sarvasiddhantaraja, 2. Manuscript Sources and Stemma, 2.1 Catalogues, holding institutions, and manuscript sigla, 2.2 Metadata, structure, and content of the manuscripts, 2.3 Stemma of the manuscript witnesses, 2.4 Editorial Notes, 3 Critical Edition, 4 Edited Sanskrit text and its English translation , 5 Critical Notes and Technical Analyses, A Nityananda's geodetic method vis-a-vis al-Biruni's method to calculate the Earth's radius, B The cosmography of the Pura?as, C Numbering of verses in the critical edition vis-a-vis the eight manuscripts of the goladhyaya in Nityananda's Sarvasiddhantaraja.