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"During October, 1971, four cesium atomic beam clocks were flown on regularly scheduled commercial jet flights around the world twice, once eastward and once westward, to test Einstein's theory of relativity with macroscopic clocks. From the actual flight paths of each trip, the theory predicted that the flying clocks, compared with reference clocks at the U.S. Naval Observatory, should have lost 40+/-23 nanoseconds during the eastward trip and should have gained 275+/-21 nanoseconds during the westward trip ... Relative to the atomic time scale of the U.S. Naval Observatory, the flying clocks lost 59+/-10 nanoseconds during the eastward trip and gained 273+/-7 nanosecond during the westward trip, where the errors are the corresponding standard deviations. These results provide an unambiguous empirical resolution of the famous clock "paradox" with macroscopic clocks."
J.C. Hafele and R. E. Keating, Science 177, 166 (1972)
They put an atomic clock on concord once to prove this.
Originally posted by WhizPhiz
I'm pretty sure it has been shown that travelling around the world in a really fast jet will cause time dilation. Meaning the clock on the jet will slightly differ from real world time...I think...maybe someone can be more specific...
Originally posted by Xeven
I am curious if movement through space actually causes time to exist? The faster you move through space the slower time acts on the objects moving. It would seem to me if you slow down time would speed up.
But what if you stoped in relation to space? If you lanched a probe and sent it directly away from the path of our Galaxy to the point where it was at rest in space in relation to the speed our galaxy moves or in relation to the speed of light, would time even exist?
If that probe had a telescope what would it see in a place where time does not exist? Seems like this would be an easy experiment to test. if you turned on a laser on this probe would it even emit light or would that light be traped due to time not existing like in a black hole?
If an object is not moving in relation to space does time exist?
Originally posted by Tykonos
You've got to love that relativity!
If a star is travelling away from the big bang at some crazy speed, will the light pointing towards the big bang be slower than the light travelling out from the other side of the star or would it be the same?
Originally posted by tarifa37
reply to post by Seventytwo
I think of time as being two things , the first being our perception of it, i.e feeling the passage of time counting out a minute in seconds sitting through a boring film etc. The second is the effect time has on us and objects matter etc. In other words decay. We and almost everything around us is suffering from decay caused by not time itself but elements such as oxygen rust mould whatever causes an object to decay. Therefore if you placed a gold bar that doesn't decay or tarnish in a vacuum time would stand still for that gold bar. I think It would be impossible to tell how long it had been in the vacuum without it being monitored from the start.
Rewriteing the Past
The past is set in stone, right? Everything we have learned tells us that you can not change the past, 88-MPH DeLoreans notwithstanding.
However, it would probably surprise you to learn that many highly respected scientists, as well as a few out on the fringe, are questioning that assumption, based on real evidence.
For example, leading stem cell scientist, Dr. Robert Lanza, posits that the past does not really exist until properly observed. His theory of Biocentrism says that the past is just as malleable as the future.