The Crest of the Peacock


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The Gospel in the Stars


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Bhr̥gu Nandī Nāṛī


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A classical work based on nāḍī technique of prediction.




21st Century Astronomy


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A textbook that facilitates learning by doing.







Understanding Gravitational Waves


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The birth of a completely new branch of observational astronomy is a rare and exciting occurrence. For a long time, our theories about gravitational waves—proposed by Albert Einstein and others more than a hundred years ago—could never be fully proven, since we lacked the proper technology to do it. That all changed when, on September 14, 2015, instruments at the LIGO Observatory detected gravitational waves for the first time. This book explores the nature of gravitational waves—what they are, where they come from, why they are so significant and why nobody could prove they existed before now. Written in plain language and interspersed with additional explanatory tutorials, it will appeal to lay readers, science enthusiasts, physical science students, amateur astronomers and to professional scientists and astronomers.




Challenges of Astronomy


Book Description

A unique collection of thirty experiments ranging from ancient astronomy to cosmology, each containing one or more challenges for the reader. The progression here is from the Earth outward through the solar system to the stellar and galactic realm. Topics include the shape of the sky; Stonehenge as a stone-age abacus; determining the size of the Earth; the distance of the moon, stars and planets; planetary mass, density, temperature and atmosphere; the speed of light; the nature of the quiet and active sun; photometry and spectroscopy; star clusters and variable stars; and fundamental properties of stars.




The Night of the Gods


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Picatrix


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A manual for constructing talismans, mixing magical compounds, summoning planetary spirits, and determining astrological conditions, Picatrix is a cornerstone of Western esotericism. It offers important insights not only into occult practices and beliefs but also into the transmission of magical ideas from antiquity to the present. Dan Attrell and David Porreca’s English translation opens the world of this vital medieval treatise to modern-day scholars and lay readers. The original text, Ghāyat al-Ḥakīm, was compiled in Arabic from over two hundred sources in the latter half of the tenth century. It was translated into Castilian Spanish in the mid-thirteenth century, and shortly thereafter into Latin. Based on David Pingree’s edition of the Latin text, this translation captures the spirit of Picatrix’s role in the European tradition. In the world of Picatrix, we see a seamless integration of practical magic, earnest piety, and traditional philosophy. The detailed introduction considers the text’s reception through multiple iterations and includes an enlightening statistical breakdown of the rituals described in the book. Framed by extensive research on the ancient and medieval context that gave rise to the Latin version of the text, this translation of Picatrix will be an indispensable volume for students and scholars of the history of science, magic, and religion and will fascinate anyone interested in the occult.




Computational Intelligence in Pattern Recognition


Book Description

This book features high-quality research papers presented at the 3rd International Conference on Computational Intelligence in Pattern Recognition (CIPR 2021), held at the Institute of Engineering and Management, Kolkata, West Bengal, India, on 24 – 25 April 2021. It includes practical development experiences in various areas of data analysis and pattern recognition, focusing on soft computing technologies, clustering and classification algorithms, rough set and fuzzy set theory, evolutionary computations, neural science and neural network systems, image processing, combinatorial pattern matching, social network analysis, audio and video data analysis, data mining in dynamic environments, bioinformatics, hybrid computing, big data analytics and deep learning. It also provides innovative solutions to the challenges in these areas and discusses recent developments.