Exam 15: The Milky Way Galaxy: a Spiral in Space

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Stars within an emission nebula, such as M42, are considered Population I stars.

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The rotation curve for our Galaxy shows stars beyond the Sun moving more slowly than expected.

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The bright blue stars of Orion's Belt are Population I, while our yellow Sun is population II.

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The spiral arms are sites of continuous new star formation, accounting for their blue color and pink emission nebulae.

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The visible color of the Galactic Bulge is

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All Cepheids are giants, but not all giant stars are Cepheid variables.

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The nearest comparable galaxy to our own lies in the constellation of

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Our surveys of the Galactic Center are better done in infrared than visible light.

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Which statement is true?

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How does metal content vary between young disk stars and older halo stars? Why?

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The Sgr A* black hole may contain three million solar masses.

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The Galactic Disk has been flattened by the of the Galaxy.

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Shapley found that globular clusters are only found in the Galactic bulge.

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Harvard woman astronomer discovered the period- luminosity relation.

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Galactic disks appear blue because

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With respect to heavy elements, the stars of the Halo are in metals.

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Harlow Shapley mapped the Milky Way using the period- luminosity relationship for RR Lyrae stars.

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Of what is the galactic halo composed?

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The rotation curve of the outer portions of the Galaxy revealed what about its mass?

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Population I stars came billions of years before Population II stars.

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