| 1. | Scientists express this condition of critical density as omega equals one.
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| 2. | Beyond that is a critical density, where additional debris leads to additional collisions.
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| 3. | Bahcall said of the lack of observational evidence for critical density.
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| 4. | I don't understand what critical density is, so I can't comment.
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| 5. | Cosmologists often simplify this equation by defining a critical density, \ rho _ c.
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| 6. | For theoretical and perhaps esthetic reasons, cosmologists have long been partisans of critical density.
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| 7. | "If these observations are right, then we've found the critical density, " said Guth.
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| 8. | And the Big Bang theory seems to demand critical density.
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| 9. | Between these two extremes, there is a more attractive possibility, a condition called critical density.
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| 10. | This is why space is hyperbolic for low densities ( below the critical density ).
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