See Illustration 11
From Nordan Symposia
Jump to navigationJump to searchError creating thumbnail: Unable to save thumbnail to destination
Error creating thumbnail: Unable to save thumbnail to destination
BIG BANG EXPANSION SCENARIOS
The Universe is (1) open, (2) closed, or (3), flat, depending on whether the ratio of its actual density to the "critical density", called omega, is <1, >1, or precisely equal to 1. The "critical density" of the Universe is the density above which the Universe would go on expanding forever.
