21st Century Astronomy: Stars & Galaxies 7/e 2022. (7版)

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Comprehensive and authoritative, 21st Century Astronomy fosters scientific literacy by offering carefully crafted activities that help students apply the process of science to astronomy, the news, and the world. The 21st Century learning package provides the most up-to-date astronomy research, engaging students as they prepare for lecture, perform in-class activities, and complete meaningful homework assignments―both in person and online. Lead author Stacy Palen draws on her experience teaching at an open enrollment university to build intentionality and transparency into every aspect of the learning package, giving activities a clear purpose and making them easy to execute without special equipment. Norton’s service supports every instructor, every step of the way.

COSMIC PINWHEELS: SPIRAL GALAXIES AND THE UNIVERSE

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"It is strongly biased towards the author's speciality of galaxy morphology, and particularly to bars and rings. To be fair, these are often given fairly short shrift in other textbooks, so this is a useful source of detail on such topics from an expert. In addition, references to original technical papers are given throughout which makes the book a handy introduction to the literature (which students may well find useful)." The Observatory Magazine The main goal of the book is to introduce the reader to the world of spiral galaxies, how spirals were discovered, what they represent from a physical point of view, and what people have learned about the universe and the nature of galaxies in general from the study of spirals. Topics include early discoveries of nebulae, the island universe concept, the structure of spirals as seen both visually with telescopes and in images obtained with different filters, the role of spirals in the discovery of interstellar dust and dark matter, the different kinds of spiral galaxies and the importance of bars and rings, how different non-spiral galaxy types such as elliptical galaxies and S0 galaxies connect to spirals, and how spirals have contributed to our understanding of star formation and evolution, galaxy formation and evolution, the cosmological distance scale, and the universal expansion. The Milky Way as a spiral galaxy is also discussed. The book is profusely illustrated and not only a discourse on the spirals, but is also a personal reminiscence based on the author's studies of spiral galaxies over the past 45 years.