Descriptive Astronomy Week 14 Homework.pdf - Descriptive...

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Descriptive AstronomyHomework: Week 14VocabularyMilky Way Galaxy- the galaxy of which the sun and the solar system are a part and which contains themyriads of stars that create the light of the milky wayCentral Bulge- part of milky way; surrounding the nucleus in an extended bulge of stars that is nearlyspherical in shape, rich in heavy elementsSpiral Arm- sits of ongoing star formation and are brighter than surrounding disc because of the young,hot OB stars that inhabit themHalo-a circle of white or colored light around the sun, moon, or other luminous body caused byrefraction through ice crystals in the atmosphereSupermassive Black Hole—the largest type of black hole, found in the center of almost all currentlyknown massive galaxiesDark matter- nonluminous material that is postulated to exist in space and that could take any severalforms including weakly interacting particles.Population I Star- include the sun and tend to be luminous, hot and young, concentrated in the disks ofspiral galaxiesPopulation II Star- tend to be less luminous, older and cooler than Population I starsSpiral Galaxy- a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiralarmsBarred Spiral Galaxy- a spiral galaxy with a central bar shaped structure composed of starsElliptical Galaxy- a type of galaxy having an approximately ellipsoidal shape and a smooth nearlyfeatureless brightness profile

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Physics for Scientists and Engineers
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Chapter 33 / Exercise 2
Physics for Scientists and Engineers
Jewett/Serway
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