Astronomy is designed to meet the scope and sequence requirements of one- or two-semester introductory astronomy courses. The book begins with relevant scientific fundamentals and progresses through an exploration of the solar system, stars, galaxies, and cosmology. The Astronomy textbook builds student understanding through the use of relevant analogies, clear and non-technical explanations, and rich illustrations. Mathematics is included in a flexible manner to meet the needs of individual instructors.

This 11-minute video lesson looks at Hubble's Law. [Cosmology and Astronomy playlist: Lesson 26 of 85]

This 9-minute video lesson discusses quasars. [Cosmology and Astronomy playlist: Lesson 35 of 85]

The spring 2017 syllabus for the General Astronomy Course (AST 110), developed as part of the textbook free courseware initiative at Borough of Manhattan Community College.

This course provides an introduction to the universe beyond the Earth. We begin with a study of the night sky and the history of the science of astronomy. We then explore the various objects seen in the cosmos including the solar system, stars, galaxies, and the evolution of the universe itself. As an online course, it is equivalent to 6 lecture hours, and satisfies science requirements for the AA and AS degree. It is designed to be thorough enough to prepare you for more advanced work, while presenting the concepts to non-majors in a way that is meaningful and not overwhelming. We will consider the course a success if you have learned how to think about the universe critically in an organized, logical way, and to have enhanced your appreciation of the sky around us.

A introductory look at our understanding of the universe, and how this understanding has changed from Ancient Greece to the contemporary views of today.

This course introduces students to the fundamental aspects of the history, philosophy, and science of the astronomical universe. It will provide students an opportunity to learn and appreciate the world of Astronomy and how it relates to their other studies, their careers and their lives as citizens and professionals. Students will discover the phenomena of our solar system and beyond - planets and moons, asteroids and meteors, stars and black holes, constellations and galaxies and several other phenomena

Discussion of the redesign of AST 1002 Descriptive Astronomy using a mashup of OER resources. Many of these tools could be replicated in other disciplines.

The slideshows that go with OpenStax Astronomy are PowerPoint, which is great for editing and improving, but a bit awkward for instructors who need to load MS PowerPoint in order to present. I used the cc-by license to place them on Wikiversity.

I also invite others to collaborate on developing OpenStax materials on Wikiversity and/or Miraheze.

Textbook for ASTRON 102 THE SOLAR SYSTEM at College of the Canyons
Surveys the solar system, including the earth and its motions and seasons; the moon, eclipses, and tides; the content and dynamics of the solar system; planets and their satellites, asteroids, comets, and meteorites; and the evolution of the solar system.

Relativity Lite is designed for the General Astronomy sequence (PH 361-2U, SCI 315-6U) whose primary book glosses over Special Relativity and General Relativity while trying to explain the Cosmology that is based on those subjects. Relativity Lite translates the mathematical equations conventional relativity texts rely upon into pictures that are readily understood and contain within them the mathematical essentials. This book provides the comprehensive coverage needed to understand, in sufficient depth, these three linked areas of our reality.

Readers seeking this knowledge on their own, and those in other courses for nonscientists, may also find it helpful.