Recent content by grantcallaway

Thanks for taking the time to respond guys. I understand what you are saying regarding "not staying stationery within an IRF grid" due to the turn-around and acceleration, but this assumes that the IRF grid is (in this instance) the earth. But supposing there was a second Earth revolving...

Hi all, Please forgive my simplistic understanding on this, as I am a novice with an interest in Science, but I have the following question: I've been reading a book on Einstein, and here's the stuff I get: Speed is relative since there is nothing to "fix" a grid to which we know to be...