What Do Astronomers Mean When They Say That the Universe

question 139

Multiple Choice

What do astronomers mean when they say that the universe is homogeneous?

• A) The number of galaxies, averaged over large scales, is the same at any distance from Earth.
• B) There are no mass concentrations anywhere in the universe.
• C) The universe is static and unchanging.
• D) At any given time, the universe looks the same in all directions.

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Definitions:

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