- This is a scan of the original book including illustrations. Refer to the Wikisource copy if you prefer text that is more easily copied and pasted.
- In order to emphasise the importance of the reforms introduced into astronomy by Kepler, it will be well to sketch briefly the history of the theories which he had to overthrow. In very early times it must have been realised that the sun and moon were continually changing their places among the stars. The day, the month, and the year were obvious divisions of time, and longer periods were suggested by the tabulation of eclipses. We can imagine the respect accorded to the Chaldaean sages who first discovered that eclipses could be predicted, and how the philosophers of Mesopotamia must have sought eagerly for evidence of fresh periodic laws.
- Geology of Interstate Park (PDF) (dnr.state.mn.us)
Interstate State Park, at Taylors Falls, Minnesota, contains some of the most outstanding and unique geological features to be found anywhere in the world. The story of how these features came to be as we see them today is complex but fascinating.
- Kepler (en.wikisource.org)
Soon after its publication Kepler’s “Epitome” was placed along with the book of Copernicus, on the list of books prohibited by the Congregation of the Index at Rome, and he feared that this might prevent the publication or sale of his books in Austria also, but was told that though Galileo’s violence was getting him into trouble, there would be no difficulty in obtaining permission for learned men to read any prohibited books, and that he (Kepler) need fear nothing so long as he remained quiet. [Chapter 6]