<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>You have just put your finger on the "paradox" part of the twin's paradox. How indeed? Two answers are available.
(1) In Einstein's special relativity, each inertial frame has its own time. near the present; that receding parts of the other frame are experiencing time in the past; and that approaching parts of the other frame are now experiencing time in the first frame's future.
When this convoluted picture is worked out, it means that, because time is everywhere different depending on your frame and your speed relative to other frames, it is easily possible for two clocks with a relative speed to each determine that the other is ticking slower than itself. That is what SR is all about.
Part of what SR predicts -- namely that clocks in moving frames do appear to slow down -- has been verified beyond a reasonable doubt in numerous experiments, several of which are sketched in cartoon fashion in our presentation on "Gravitational force vs. gravitational potential" at <
metaresearch.org/cosmology/gravity/gravity.asp
>. However, fortunately, the SR interpretation is not the only one to make the same prediction.
(2) In Lorentzian relativity, Locally, that preferred frame is the "Earth-centered inertial" frame, a reference frame centered on the Earth that does not share the Earth's rotation.
So in LR, if both clocks move in different directions at the same speed relative to the ECI frame (for example, two satellites in the same orbit moving in opposite directions), then each of those two clocks will agree with the other about both time and clock rates.
I know this stuff can be confusing, and even experts disagree among themselves about how to explain things like the twin's paradox. But the essence of the two leading theories can be briefly summarized this way:
* In SR, relative motion alters time itself.
* In LR, motion relative to the local gravity field alters the rate of ticking of clocks, but nothing happens to "time". -|Tom|-
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
So, each twin is compartmentalized in 'their own time bubble' and
each particular 'time bubble' is regulated by the gravity in the
space they occupy and /or the velocity of the 'time bubble'?
Q: twin* travels to neutron star GRO J1655-40
cuts the engines and becomes 're-scaled'or synchronized to the'local'
Does twin* age in ECI (normal,standard)condition? at this remote site
..the atomic clocks are ticking alike, ergo the biological processes
are also in sync- so twin* and twin**(on earth) remain contemporary?
Until, of course twin* meets his demise from the energetic radiation
of the neutron star /or is assimilated by the massive gravity field.
s/riff-raff
enjoy the journey
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