How Does the Addition of a Nonzero Cosmological Constant Affect

question 61

Multiple Choice

How does the addition of a nonzero cosmological constant affect the expansion of the universe?

• A) It is possible for the mass density of the universe to be below the critical density and still collapse.
• B) It is possible for the density of the universe to be below the critical density and still expand forever.
• C) It is impossible to have a collapsing universe,regardless of its density.
• D) It is impossible to have an expanding universe,regardless of its density.

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