Titled 'The Unanswered', the main aim of the book is to explore the truth. The book is useful for anyone associated with astrology at any level and for astronomers who wish to explore the ancient stuff. The book is divided into two parts. This part, Part I, discusses the ayanamsa concept in detail and presents major part of the research work. Being first in the world, it reveals certain important findings such as "how controversial oscillating ayana of 27 degree as mentioned in Surya Siddhantha is valid even when compared to modern astronomy?" and why it is called ayanamsa and not vishuwamsa? Additionally, it resolves the issue of Surya Siddhantha's longer year length and explains how it is calculated.All the topics in the book are well-researched so as to present the details with enough academic as well as logical support.