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ASTR001 Ch. 2 Outline - ASTR001 Ch.2 Outline Discovering...

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ASTR001 Ch.2 OutlineDiscovering the Universe for YourselfI.Patterns in the Night SkyA.What does the universe look like from Earth?1.Constellationsa.a constellation is a region of the sky with well-defined borders; the familiarpatterns of stars merely help us locate the constellations.2.The Celestial Spherea.The Earth seems to be in the center of a celestial sphere because it iswhere we are located as we look into space.3.The Milky Waya.In all directions that we look within the Milky Way, we see the countlessstars and vast interstellar clouds that make up the Milky Way in the nightsky. We can observe the distant universe only when we look in directionsaway from the galactic disk, so that there are relatively few stars andclouds to block our view.b.The dark lanes that run down the center of the Milky Way contain thedensest clouds, and they appear dark because these clouds obscure ourview of stars behind them.4.The Local Skya.The half of the celestial sphere that you see at any time represents whatwe call your local sky – the sky as seen from wherever you happen to bestanding. The zenith is the point directly overhead, while the meridian isan imaginary half circle stretching from the horizon due south, through thezenith, to the horizon due north.5.Angular Sizes and Distancesa.The angular size of an object is the angle it appears to span in your fieldof view.b.The angular distance between a pair of objects in the sky is the angle thatappears to separate them.c.For more precise astronomical measurements, we subdivide each degreeinto 60 arcminutes and subdivide each arcminute into 60 arcseconds.B.Why do stars rise and set?

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Term
Fall
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AGUIRRE
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The document you are viewing contains questions related to this textbook.
Physics for Scientists and Engineers
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Chapter 10 / Exercise 1
Physics for Scientists and Engineers
Jewett/Serway
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