Acknowledgements

This open “textbook” was designed for GEOL 64: Planetary Geology, an introductory science course at Queens College CUNY that explores our cosmic neighborhood, and its creation was funded in part by the CUNY OER Initiative. While some text in this resource is original, most chapters are adapted from other open-source textbooks including An Introduction to Geology from Salt Lake Community College, Physical Geology – 2nd Edition from BCcampus, Introduction to Earth Science, Second Edition from University Libraries at Virginia Tech, Physical Geology, First University of Saskatchewan Edition from SaskOER, and Astronomy2e by OpenStax. Complete licensing information for these sources is provided on every digital page where their content is used and it appears in the “Licensing Details” section of this textbook’s front matter. Other resources frequently used include Teach Astronomy, NASA webpages, and YouTube videos.