An Introduction to Astronomy
by Forest Ray Moulton
Publisher: The MacMillan Company 1916
Number of pages: 577
The aim has been to present the great subject of astronomy so that it can be easily comprehended even by a person who has not had extensive scientific training. It has been assumed that the reader has no intention of becoming an astronomer, but that he 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.
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by James N. Pierce
A book written for teachers (and parents) of students in grades K-6. The astronomy topics it covers are those most commonly found in these grade levels: Earth and Sun; night and day; seasons; phases of the Moon; eclipses; solar system; planets...
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 George C. Comstock - D. Appleton and company
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.
by Nick Strobel - astronomynotes.com
The notes cover: astronomy's place in the scientific endeavor, scientific method, astronomy without a telescope, history of astronomy, Newton's law of gravity, relativity theories, electromagnetic radiation, telescopes, solar system, the stars, etc.