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High School Electives
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Astronomy
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Expansion of Space
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Astronomy
AST.243 Expansion of Space
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Which answer best completes the sentence? The universe is not expanding into empty space in the same way smoke expands into a room because _____.
A
empty space exists only inside stars.
B
cosmology treats space itself as part of what is expanding.
C
the Milky Way blocks the universe from expanding.
D
smoke has no particles, but galaxies do.
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