PowerWeb subscription included with each new textbook. Harness the assets of the Web to keep your course current with PowerWeb! This online resource provides high quality, peer-reviewed content including up-to-date articles from leading periodicals and journals, current news, weekly updates with assessment, interactive exercises, Web research guide, study tips, and much more!
Students and professors get free access to this powerful Internet-based tool for studying and researching astronomy.

FREE Interactive CD-ROM. This CD-ROM includes the Arny text, animations, video, audio, an image bank, full text search engine, links to web sites, and planetarium software. The CD-ROM is hybrid, so it's compatible on both MAC and Windows systems.
This CD-ROM will grab the students' attention and will greatly enhance the coverage of this subject.

Analogy Sketches are included in the margins. Analogies are an essential part of the Arny text. Analogy sketches help to further the concept by giving students an image to work with.
These visually remind students what the important analogies are; helps students and instructors locate the analogies in the text.

6 New Interactives (on the OLC and CD-ROM):
Each Interactive will allow students to manipulate parameters and gain a better understanding of topics such as Blackbody Radiation, The Bohr Model, Retrograde Motion, Cosmology, Solar System Builder and the H-R Diagram by watching the affect of these manipulations.

The name of the "Re-modeling" boxes have been changed to "The Scientific Method At Work," to better emphasize the function of the Scientific Method in astronomy. These boxes deal with the dynamic nature of scientific models, explaining how new technologies and information lead to the evolution and refinement of our theories.

Updated Coverage: Revised the Kepler's third law math by adding more explanation and putting the detailed math in a box called "Extending Our Reach: Weighing the Sun."
Added a short section on electromagnetic radiation.
The Doppler Shift.
Expansion of the Extra-Solar Planets.
Cosmological Constant.

VOLUMES! Arny is now available in 2, full color, volumes. Volume 1 covers the Solar System, Volume 2 covers Stars and Galaxies.

Latest Scientific Information!
Students get all of the latest information to help them remain current in the field of Astronomy.

Comprehensive Web Site: The web site gives instructors the tools they need, and provides study aids and enrichment for students. Instructors will have access to sample syllabi and lecture outlines. The web site will also include animations, hundreds of images, chapter summaries and key terms, web links, scorable practice quizzes, interactive tutorials, and much more.
Students and instructors will be better able to quickly incorporate the Internet into their classroom. Students will have a large number of resources at their fingertips on the world wide web.

Accessible writing style that allows coverage of technically complex ideas without confusing students. Tom Arny gives the students a reason to read every sentence.
Students read the text and learn from what they read allowing the professor more class time to explore more concepts.

"Observational Activities": Many additional activities are included that students can try at home or in class. These are scattered throughout the text.
These activities grab students attention and make studying a more active learning experience. These could also be used by the instructor for in-class or homework assignments.