Friedmann Equation: Newtonian derivation - Astronomy

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two

Because for non-relativistic particles mass in a comoving volume is preserved, we

can re-write the Fieadmann equation in a different form:

Critical density:

Special case:

We can find how the contribution of matter to the total density changes with time:

If , then

SimpleDerivation Page 2

Sunday, August 12, 2007

5:31 PM

Lab 6: Kepler's Laws Introduction Section 1: First Law

two Because for non-relativistic particles mass in a comoving volume is preserved, we can re-write the Fieadmann equation in a different form: Critical density: Special case: We can find how the contribution of matter to the total density changes with time: If , then If , then SimpleDerivation Page 2 Sunday, August 12, 2007 5:31 PM

three In this case Solution of this equation is: Age of the Universe SimpleDerivation Page 3 Sunday, August 12, 2007 7:47 PM

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Friedmann Equation: Newtonian derivation - Astronomy

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