Most astronomers currently believe the universe has a flat geometry (zero curvature), based on observations of the cosmic microwave background radiation and other cosmological data. These observations suggest that the universe is very close to being flat, with its total energy density very close to the critical density needed for a flat universe.

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At the Present Time

Question 189

Multiple Choice

At the present time

A) most astronomers believe the universe has a spherical geometry (positive curvature) .
B) most astronomers believe the universe has a flat geometry (zero curvature) .
C) most astronomers believe the universe has a hyperbolic geometry (negative curvature) .
D) there is no consensus among astronomers about the geometry of the universe.

Correct Answer: