Making sense of the Universe

[martillo]

Does anybody knows about some experimental evidence towards or against this possibility?
For example about collisions between stars, have some collisions between stars have been observed through telescopes?
Do the stars have some kind of "ellastic collision" where the two stars separate after the collission remaining quite as if they were before the collision or they "smash" one into the other remaining as one bigger star after the collision?
Is there some information about real collision between stars?
I made a search in the web but only found computational simulations of stars' collisions only (with theoretical assumed models of course)...