Astronomy final 2012
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| Approximately how far is the Sun from the center of our Galaxy? | show 🗑
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| What type of object has been proposed to explain the tremendous activity detected at the center of our Galaxy? | show 🗑
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| Harlow Shapley first located the center of our Galaxy in 1917 by | show 🗑
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| show | Sagittarius
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| show | in the disk of the Galaxy, inside a spiral arm or segment of a spiral arm
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| show | diameter 100,000 light-years; thickness 2000 light-years
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| Cepheid variable stars are useful to astronomers as indicators of | show 🗑
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| show | interstellar dust, which obscured the more distant stars and thereby localized his observations
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| show | Young O and B stars, dust, and gas
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| The time for the Sun to orbit the galactic center once in its motion in the Galaxy is | show 🗑
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| show | Gravity
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| Which type of galaxy typically contains the least relative amount of gas and dust? | show 🗑
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| show | Irregular and small elliptical galaxies
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| _____ galaxies contain mostly Population II stars; while _____ galaxies contain both Population I and Population II stars | show 🗑
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| Which type of galaxy has a disk with no spiral arms? | show 🗑
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| Which type of galaxy has a large elongated nucleus with tightly-wound arms? | show 🗑
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| show | Elliptical
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| show | A rich cluster
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| The _____ that is affecting the motion of the Local Group is believed to be a yet unseen _____. | show 🗑
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| What is the rotation curve of a galaxy? | show 🗑
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| What is the evidence for dark matter? | show 🗑
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| show | from the accretion disk around a massive black hole
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| show | Their pulsation period is related to their luminosity
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| Which of the following is not true of Hubble’s law? | show 🗑
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| show | 70 kilometers per second per megaparsec
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| show | By looking at very distant galaxies
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| show | Both the Big Bang model and the Steady State model
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| Which of the following provides the strongest evidence in support of the Big Bang model? | show 🗑
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| show | he expansion of the Universe is speeding up
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| Which of the following findings are in agreement with the predictions of the Big Bang model? | show 🗑
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| show | Quarks, protons, electrons, atoms
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| show | age of the Universe
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| show | flat (i.e., no curvature)
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| According to the Big Bang model, most of the _____ in the Universe were formed ____. | show 🗑
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| Presently, the accepted value for the Age of the Universe is _______ | show 🗑
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Created by:
Izzy-Bellz