by Nick Strobel
Publisher: astronomynotes.com 2010
The notes cover: an overview of astronomy's place in the scientific endeavor, the scientific method, astronomy without a telescope, a history of astronomy, Newton's law of gravity and applications to orbits, Relativity theories, electromagnetic radiation, telescopes, the solar system, properties of the stars, the Sun, fusion reactions, stellar structure, stellar evolution, the interstellar medium, the Milky Way galaxy, extra-galactic astronomy, cosmology, and extra-terrestrial life.
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by Forest Ray Moulton - The MacMillan Company
It has been assumed that the reader has an interest in the wonderful universe which surrounds him, and that he has arrived at such a stage of intellectual development that he demands the reasons for whatever conclusions he is asked to accept.
This website surveys the entire extent of the universe touching upon phenomenon from the largest to the smallest size and covering the entire cosmic interval. It presents observations as well as the theories which explains the phenomena.
by Andrew Fraknoi, David Morrison, Sidney C. Wolff - Unglue.it
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The author concentrates attention upon those parts of the subject that possess special educational value. Matter which permits of experimental treatment with simple apparatus is of peculiar value and is given a prominence in the text.