Lokmanya Balgangadhar Tilak, an Indian nationalist and scholar, made significant contributions to the study of Vedic chronology through his work "The Arctic Home in the Vedas" and his analysis of Vedanga Jyotisha. Here's a brief overview:Vedic Chronology Tilak proposed that the Vedas, ancient Indian scriptures, contain references to astronomical phenomena that could be used to date their composition. He argued that the Vedic texts indicated a period of time when the Arctic region was much more temperate, suggesting that the Vedic people might have lived in the Arctic or sub-Arctic regions during a distant past.Vedanga Jyotisha Vedanga Jyotisha is one of the six Vedangas, which are disciplines related to the Vedas. It is an ancient Indian text that deals with astronomy and astrology. Tilak examined this text to establish a timeline for Vedic events and to support his theory of the Vedic homeland's geographical location.Tilak's Thesis Tilak's thesis was revolutionary in suggesting that the Vedic civilization could have existed in the Arctic region and later migrated southwards due to climatic changes. He used astronomical references in the Vedas and the Vedanga Jyotisha to support his claims, proposing that the Vedic texts contain ancient astronomical data pointing to a time when the Arctic was habitable.Tilak's work was pioneering but controversial and has been the subject of debate among scholars. His theories offered a different perspective on the origins and dating of Vedic civilization, challenging traditional views of ancient Indian history.

The table of contents for Vedic Chronology and Vedanga Jyotisha by Lokmanya Balgangadhar Tilak provides a structured outline of the book’s content, focusing on the ancient Vedic texts and their implications for understanding Indian chronology and astronomy. Although the exact table of contents may vary slightly by edition, here is a general outline based on the book’s themes and structure:Table of Contents PrefaceIntroduction to the book’s objectives and the author's motivations. Chapter 1: Introduction to Vedic ChronologyOverview of the concept of time and chronology in the Vedic tradition. Historical context and importance of Vedic texts in dating historical events. Chapter 2: The Vedanga JyotishaDetailed examination of the Vedanga Jyotisha, its significance, and its role in Vedic astronomy. Explanation of the text’s content related to astronomical calculations and calendar systems. Chapter 3: Vedic Astronomical SystemsAnalysis of ancient Vedic astronomical knowledge and methods. Discussion on how Vedic texts describe celestial phenomena and timekeeping. Chapter 4: Methods of Dating in Vedic LiteratureExamination of various methods used in Vedic literature for dating historical and astronomical events. Comparison with other traditional and modern dating systems. Chapter 5: Reconciliation with Western ChronologyComparison of Vedic chronological systems with Western historical methods. Efforts to reconcile Vedic dates with historical and astronomical findings from other cultures. Chapter 6: Implications for Indian HistoryExploration of how the findings impact the understanding of Indian history. Discussion on the historical timeline established through Vedic texts. Chapter 7: Criticisms and ChallengesReview of criticisms and challenges to Tilak’s interpretations. Responses to major critiques and alternative viewpoints.