This provocative 1612 essay outraged the author's contemporaries by challenging Aristotelian physics and by asserting that sunspots are actual spots on the surface of the sun or in its atmosphere, rather than satellites. This edition of the landmark work features an informative Introduction, Explanatory Notes, and an Index.
Here's a sample of other books in this Dover category
Dialogues Concerning Two New Sciences by Galileo Galilei As enjoyable as it is important, this classic encompasses 30 years of highly original experiments and theories. Its lively expositions discuss dynamics, elasticity, sound, strength of materials, and more. 126 diagrams.
A Treatise of the System of the World by Sir Isaac Newton Originally written as part of Principia Mathematica, this volume is a popular discussion of the author's theory of universal gravitation. It is appropriate for upper-level undergraduates and graduate students.
