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Posted by Jim on January 19, 2001 22:18:50 UTC

Visible light and cosmic rays are both forms of electromagnetic radiation. There is no need for the distinction in what "mediates our knowledge".

Direct interaction is not required for developing good theories. Other lines of proof are scientifically acceptable (and have to be in order to understand much of the astronomical and microscopic/subatomic aspects of the universe).

You are correct that theories are refined as better data are obtained. However, I'll point out that Big Bang Theory is supported by lots of good evidence. It is not some kind of speculation. Sure, it's not "absolutely proven", but no theory ever is in science (which is why it's called a theory).

An accelerating universe, if true (as it seems to be) would not invalidate Big Bang Theory. It can be readily incorporated.

You can be sure that cosmologists/astronomers have accounted for other forms of redshift in their calculations.

In setting out to "prove Big Bang Theory" those same scientists are simultaneously trying to disprove it. That is how science works. You run experiments to test the unknowns. If the data fit the theory, then great, if not, then the theory is refined or rejected.

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