There are many quality texts available for astronomy, but they are often at a higher level than is appropriate for introductory astronomy courses taught often to non-science majors.

Designed to meet the scope and sequence of your course, Astronomy 2e is written in clear non-technical language, with the occasional touch of humor and a wide range of clarifying illustrations.

OpenStax provides free, peer-reviewed, openly licensed textbooks for introductory college and Advanced Placement® courses and low-cost, personalized courseware that helps students learn.

Looking for Astronomy Books? Here we present 7 astronomy books that you can read for free and download in PDF.

Classifying stars in terms of their brightness. In the 19th century, accurate measurements could be made of the brightness of stars. This was made a definition. So a star of 1st magnitude is exactly 100 …

Apr 24, 2010 · Project Gutenberg’s An Introduction to Astronomy, by Forest Ray Moulton This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever.

Oct 15, 2022 · This is a free introductory astronomy textbook published as part of the non-profit OpenStax Project (at Rice University), funded by several major foundations, to make textbooks …

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Long considered a standard text for physical science majors, Fundamental Astronomy is also an excellent reference and entrée for dedicated amateur astronomers.

What is astronomy? “The cosmos is all that is, or ever was, or ever will be.” - Carl Sagan