Horizons: Exploring the Universe

Horizons: Exploring the Universe, 14th Edition, is an astronomy textbook that introduces celestial phenomena and the methods of scientific discovery. The text focuses on examining the cosmos while showing how researchers study astronomical processes.

The textbook uses a stars-first organization that presents stellar processes before the solar system. This approach shows how planets develop as natural byproducts of star formation.

Two central questions, "What Are We?" and "How Do We Know?", guide the text to illustrate how scientists work. The authors combine an accessible conversational tone with chapter-opening Guideposts to support conceptual understanding of the universe.