If the Big Bang theory ever is disproved would the estimates on the size and age of the universe still hold true?

Ummmm..............Me thinks the "BigBang" has already been changed to the "Big Expansion". Where the Universe is Infinite, has always been and will always be........just fluctuating as the "Branes" in the 11th dimension fluctuate.

See these links: www.pbs.org/wgbh/nova/elegant/program.html http://www.damtp.cam.ac.uk/user/gr/public/qg_ss.html http://en.wikipedia.org/wiki/Superstring_theory

Then there is the Infinite Fractal Universe

See this link: http://www.stanford.edu/%7Ealinde/1032226.pdf

In any account, the Universe is VVVVEEERRRRYYYY old indeed. We know that the Earth is some 4.5 billion years old and the sun some 4.7 to 5 billion years old and our solar system is very young in comparison to the rest of the Universe so the approximately 13.7 Billion years that is attributed to it is probably pretty close in any Theory.

TommyTrouble ;-)

To build off of Tommy,

If the Big Bang theory is disproven, the estimates about the size and age of the universe will need adjusting. They are currently based off of the same ideas and models that make up Big Bang theory. How much they will need adjusting is the question, and that has no answer.

It depends on whether the theory is dis-proven in it's entirety (like aether theory of light, or phlogiston theory of heat), or if it's just shown to be limited and inadequate, like Newton's theory of mechanics.

If it's the former, large adjustments may be necessary. If the latter, small ones, as the theory isn't wrong, it just isn't complete.