Excellent! this is based on the same reasoning I've been using in explaining to people for years as to why time travel is a near impossibility. To travel in time, you must "leap" from one point in time and space... to another point, in time and space.<br><br>To travel from, say, from London today (20/08/2015) to London 100 years ago (20/08/1915) you not only have to travel 100 years n the past, but to where London was 100 years ago. That's millions of miles away from where it is today, somewhere across the Milky Way Galaxy.<br><br>Even if you had a space ship, and you transported 100 years in the past, there is almost no way you could determine where earth is in relationship to your current position and then the time to get to where you would meet earth and how long it would take to get there... The ability to travel those distances in a life time doesn't exist.<br><br>You would die somewhere in space, like a ship lost out in the middle of the ocean.,(reply>), Doesn't the solar system orbit around the galaxy?