By Michael A. Seeds, Dana Backman

ISBN-10: 0495559733

ISBN-13: 9780495559733

With their best-selling astronomy textbook, HORIZONS, authors Mike Seeds and Dana Backman assist you comprehend your home within the universe-not simply your situation in house, yet your position within the unfolding historical past of the actual universe. to accomplish this target, they makes a speciality of vital questions: "What Are We?," which highlights your house as a planet dweller in an evolving universe, guiding you to raised comprehend the place we got here from and the way we shaped, and "How will we Know?," which gives insights into how the method of technological know-how can train us extra approximately what we are.

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Extra resources for Horizons: Exploring the Universe (11th Edition)

Example text

From the southern horizon down to the south celestial pole? Learning to Look 1. Find Sagittarius and Scorpius in the photograph that opens this chapter. 2. The stamp at right shows the constellation Orion. Explain why this looks odd to residents of the northern hemisphere. 3 Cycles of the Sky Enhanced visual image Guidepost In the previous chapter you looked at the sky and saw how its motion is produced by the daily rotation of Earth. In this chapter, you will discover that the sun, moon, and planets move against the background of stars.

Com/astronomy/seeds 1. Why have astronomers added modern constellations to the sky? 2. What is the difference between an asterism and a constellation? Give some examples. 3. What characteristic do stars in a constellation or asterism share? 20 PART 1 | THE SKY 4. Do people from other cultures on Earth see the same stars, constellations, and asterisms that you see? 5. How does the Greek-letter designation of a star give you a clue to its brightness? 6. How did the magnitude system originate in a classification of stars by brightness?

14. Why does the number of circumpolar constellations depend on the latitude of the observer? 15. How could you detect Earth’s precession by examining star charts from ancient Egypt? 16. How Do We Know? How can a scientific model be useful if it isn’t a correct description of nature? Discussion Questions 1. All cultures on Earth named constellations. Why do you suppose this was such a common practice? 2. If you were lost at sea, you could find your approximate latitude by measuring the altitude of Polaris.

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Horizons: Exploring the Universe (11th Edition) by Michael A. Seeds, Dana Backman

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