| The Standard Dust Models (Λ=0) |
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| • | This
is easy to interpret. |
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| – | When
Ω0 < 1, universe is
open, hyperbolic, and expands to infinity |
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| with
finite velocity. |
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| – | When
Ω0 > 1, universe is
closed, spherical, and eventually collapse |
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| after
reaching a maximum size after a time: |
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| – | Recollapses
after a time t = 2 tmax. |
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| – | When
Ω0 = 1, universe is
critical, flat, and expands to infinity with |
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| velocity
approaching zero. Einstein-de
Sitter model: |
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