Carl Sagan 
Billions & Billions [EPUB ebook] 

Did the Universe have a beginning? Will it have an end? Or has it always been the same, never changing? This is the subject of cosmology; the study of the Universe, and this book provides a perfect i …

General relativity and quantum mechanics have become the two central pillars of theoretical physics. Moreover, general relativity has important applications in astrophysics and high-energy particle p …

The Restless Universe: Applications of Gravitational N-Body Dynamics to Planetary Stellar and Galactic Systems stimulates the cross-fertilization of ideas, methods, and applications among the differe …

Offering a series of well-defined problems supplemented by solutions, Exercises in Practical Astronomy: Using Photographs presents meaningful practical work in elementary astronomy and astrophysics. …

Bringing the material up to date, Black Holes, Wormholes and Time Machines, Second Edition captures the new ideas and discoveries made in physics since the publication of the best-selling first editi …

Reflecting the results of twenty years; experience in the field of multipurpose flights, this monograph includes the complex routes of the trajectories of a number of bodies (e.g., space vehicles, co …

The Photographic Atlas of the Stars contains 50, high-quality full color photographs of the entire night sky of the northern and southern hemispheres. Each plate is accompanied by a star map of the i …

A Practical Guide to Observational Astronomy provides a practical and accessible introduction to the ideas and concepts that are essential to making and analyzing astronomical observations. A key emp …

An astronomer brings the mysteries of space down to earth in this accessible guide to cosmology, astrophysics, and the ageless wonder of the night sky.   The universe is big. Really big. And it …