There are three possible fates for the universe: 1. eternal expansion; 2. total collapse; or 3. some equilibrium condition with no further motion. What conditions might favor one result over the other?
A) Critical volume-is the universe large enough for unlimited expansion?
B) Critical velocity-is there enough momentum to continue expansion forever?
C) Critical energy-is there enough energy in the universe to maintain either expansion or collapse?
D) Critical density-is there enough mass in the universe to cause gravitational collapse?

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The Answer of There are three possible fates for the universe: 1. eternal expansion; 2. total collapse; or 3. some equilibrium condition with no further motion. What conditions might favor one result over the other?
A) Critical volume-is the universe large enough for unlimited expansion?
B) Critical velocity-is there enough momentum to continue expansion forever?
C) Critical energy-is there enough energy in the universe to maintain either expansion or collapse?
D) Critical density-is there enough mass in the universe to cause gravitational collapse?

There Are Three Possible Fates for the Universe: 1