The Appendix of the Omnidoxy is the post-disquisitional segment of the Omnidoxy making up 460,000 words and principally includes The Grand Lexicon of Astronology, the Omnidoxical Encyclopaedia of Astronism, and the Glossary of the Omnidoxy. This segment comprises a significant portion of the entire Omnidoxy, just under one quarter of the entire text and is classified as the Peripheral Omnidoxy alongside the Preppendix of the Omnidoxy which resides before The Twelve Grand Disquisitions.

The Omnidoxy is the founding treatise of the Astronist religion and was solely authored by the philosopher and religious founder, Cometan. Partitioned into twelve disquisitions, each of which are further divided into hundreds of discourses, which are themselves titled by those which are known as rubrals, The Omnidoxy has been codified according to a unique writing structure known as insentence. The Omnidoxy not only forms the foundations of Astronism, but it remains the primary modern contributor and the book that ignited the establishment of the Astronic tradition of religion which encompasses the philosophy of Astronism. Introducing brand new philosophical concepts such as cosmocentricity, reascensionism, transcensionism, and sentientism amongst many others, The Omnidoxy remains the principal signifier of a new era in philosophy. The Omnidoxy births hundreds of new belief orientations, schools of thought, neologisms, disciplines of study, theories, and concepts which, when combined and considered collectively, have formed the basis of Astronism. The authorship of The Omnidoxy rests with the single individual philosopher, Cometan who began writing The Omnidoxy at the age of seventeen driven by what he terms as personal inspiration. The historical origination of The Omnidoxy rests in its authorship by Brandon Taylorian during early 21st century England, specifically in the northern county of Lancashire. Like in all textual criticism, the timing and location of the codification of The Omnidoxy is integral to understanding why and how it was written, especially by considering the influential factors impacting Taylorian during his construction of the text, particularly the cultural, political, religious, and social contexts of Taylorian's personal life and of wider society at the time. This forms an important branch of study within omnidoxicology known as omnidoxical criticism, or omnidoxical exegesis in which scholars study and investigate The Omnidoxy in order to discern conclusive judgements inspired by how, where, why, by whom, for whom, and in what circumstances The Omnidoxy was written.

The Glossary of the Omnidoxy is a post-disquisitional segment of the Omnidoxy within the Appendix of the Omnidoxy as part of the Original Omnidoxical Series that was solely authored and organised by Cometan. The Glossary of the Omnidoxy offers an extensive list of definitions for one hundred of the most important terms in Astronism of omnidoxical origin. The Glossary remains an authoritative guide to 100 central terms and beliefs within Astronism and demonstrated an attempt by Cometan to beginning the official organisation of Astronism and its plethora of beliefs and terminology.

The Peripheral Omnidoxy is a publication that consists of both the Preppendix of the Omnidoxy and the Appendix of the Omnidoxy publications, therefore, all non-disquisitional segments of the Omnidoxy. It was solely written and organised by the philosopher and founder of Astronism, Cometan, and was originally published by Astral Publishing, an imprint and publishing subsidiary of the Astronist Institution. It consists of a number of different types of books and genres, including reference works, philosophical musings, quotations, mythology, encyclopaedias, lexicons, and dictionaries.

The Preppendix of the Omnidoxy is the pre-disquisitional segment of the Omnidoxy that constitutes a significant portion of the entire text as part of the Original Omnidoxical Series as solely written and authored by Cometan and published by the Astronist Institution. The segment that forms the majority of the Preppendix is known as the Astronicon which is an extensive collection of mythological narratives that came to form the foundations of Astronist mythology. Additionally, the Preppendix also consists of a series of very short subsegments that introduce the Omnidoxy text, provide important background information to the treatise, and even explore some key ideas that have become important to wider Astronism. However, the most important and dominant part of the Preppendix, as aforementioned, is the Astronicon which encompasses an epic story of space mythology in which the family of Cometan are set on a course of astronomical distances to reach the astronomical elixir and to attain the long sought-after state of cosmosis. The Astronicon is the principal introducer of the world to the beautiful and rich tradition of storytelling within the Astronist religion and as a result, also introduces Astronist mythology to the world, the body of works, characters, and themes that are part of the wider Astronic tradition of mythology.

The Omnidoxical Encyclopaedia of Astronism is a post-disquisitional segment of the Omnidoxy within the Appendix of the Omnidoxy as part of the Original Omnidoxical Series solely written and organised by Cometan and published by the Astronist Institution. The Omnidoxical Encyclopaedia of Astronism provides an extensive series of encyclopaedic entries of one hundred of the most important beliefs and terms that emerged out of the Omnidoxy in relation to Astronism. These encyclopaedic entries consist of a few paragraphs each exploring the meaning of the term in question, its position in Astronism, often considering its significance in relation to other terms and beliefs. The Omnidoxical Encyclopaedia of Astronism constitutes the first encyclopaedic reference guide to Astronism and its categorisation within the Omnidoxy provides it within even greater significance and authority.

Immerse yourself into the most famous writings of Cometan; The Twelve Grand Disquisitions. This is where Astronism and the philosophership of Cometan truly began. The Core Omnidoxy publication compiles together the twelve disquisitions that form the "core" of the Omnidoxy. These disquisitions are the text's beating heart and they have held an incomparable impact on the development of Astronism. Buy your copy of Core Omnidoxy today and get all twelve disquisitions in just one book! Here's what is included in this publication: The Monodoxy: The Principles of The Aesthetic Cosmos The Duodoxy: The Principles of The Logical Cosmos The Tridoxy: The Principles of Aid & Stewardship The Tetradoxy: The Principles of Justice & Patience The Pentadoxy: The Principles of Ambition & Enlightenment The Hexadoxy: The Principles of Ontology & Perception The Septidoxy: The Principles of Cosmic Exploration The Octadoxy: The Principles of Advancement & Eschatology The Nonodoxy: The Principles of Epistemology & Ethics The Decadoxy: The Principles of Space & Time The Hendecadoxy: The Principles of Peace & Acceptance The Dodecadoxy: The Principles of Imagination & Freedom