What is it that keeps localized regions of space,such as things on Earth,planetary systems,star clusters,and whole galaxies,from participating in the general expansion of the universe?
A) their locations in places where irregularities in the chaotic Big Bang explosion permitted matter to condense
B) mutual gravitational attraction between objects in these systems
C) centrifugal force produced by the motion of the regions around a massive central object (e.g., the Sun, a supermassive black hole, etc.)
D) powerful and all-pervading gravitational pulls from the central supermassive black holes of galaxies that holds everything in the galaxies in place
Correct Answer:
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Q3: When did Einstein originally introduce his theory
Q15: Newton reached the conclusion that the universe
Q17: Einstein chose his cosmological constant to be
Q18: What do cosmologists study?
A) the formation, structure,
Q19: Why did Newton view the universe as
Q22: Who first proposed that the observed motion
Q23: Good evidence for an original Big Bang
Q25: For any object moving uniformly,velocity = distance/time.So
Q26: The cosmic microwave background was discovered by:
A)
Q55: The cosmic background radiation is
A) the flux
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