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chapter02_part1_post - sphere. The Milky Way A band of...

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Chapter 2 Discovering the Universe for Yourself
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2.1 Patterns in the Night Sky What does the universe look like from Earth? Why do stars rise and set? Why do the constellations we see depend on latitude and time of year? Our goals for learning:
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What does the universe look like from Earth? With the naked eye, we can see more than 2,000 stars as well as the Milky Way.
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Constellations A constellation is a region of the sky. 88 constellations fill the entire sky.
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The Celestial Sphere Stars at different distances all appear to lie on the celestial sphere. Ecliptic is Sun’s apparent path through the celestial sphere.
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The Celestial Sphere The 88 official constellations cover the celestial
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Unformatted text preview: sphere. The Milky Way A band of light making a circle around the celestial sphere. What is it? Our view into the plane of our galaxy. The Milky Way The Local Sky An objects altitude (above horizon) and direction (along horizon) specifies its location in your local sky The Local Sky Zenith: The point directly overhead Horizon: All points 90 away from zenith Meridian: Line passing through zenith and connecting N and S points on horizon We measure the sky using angles Angular Measurements Full circle = 360 1 = 60 (arcminutes) 1 = 60 (arcseconds)...
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chapter02_part1_post - sphere. The Milky Way A band of...

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