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- Thread starter MACHO-WIMP
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There is a well written FAQ on this:

https://www.physicsforums.com/showthread.php?t=506987 [Broken]

In mathematical terms, the radius of the observable universe is (REF: Introduction to Modern Cosmology, Eqn. A1.12):

ro = 3 c to

ro = radius of observable universe

c = speed of light in vacuum

to = age of universe

This formula will match your numbers.

https://www.physicsforums.com/showthread.php?t=506987 [Broken]

In mathematical terms, the radius of the observable universe is (REF: Introduction to Modern Cosmology, Eqn. A1.12):

ro = 3 c to

ro = radius of observable universe

c = speed of light in vacuum

to = age of universe

This formula will match your numbers.

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