Originally Posted By: Bill
Ok, There is a problem with your first idea, that the space craft is traveling at C. It just can't do that.

Someone had to point that out!

Recall that Einstein had himself travelling at c, in order to make a point. I doubt that you would consider his conclusion invalid because of that.

In his thought experiment, Einstein didnt end up with infinite (relative) mass, that would only have detracted from his line of reasoning.

Yes; I did mean to post in the physics forum. I don't know what happened there. I blame my age. smile

There never was nothing.