The Twin Paradox

From: sthfrnth (sthfrnth_at_gmail.com)
Date: 02/28/05 

Date: 28 Feb 2005 07:36:39 -0800

  A pair of twins, Adam and Eve, are thinking of what will happen to
their ages if one of them will go away from Earth on a space journey.
Will Eve for example be younger, older, or have the same age as her
brother if she leaves Earth with a space-ship and then returns after
some time?

--------- The text above is come from:
http://nobelprize.org/physics/educational/relativity/paradox-1.html

My questions are:

1, If we don't take account of the acceleration when the space-ship
launches and turns back, what is the comparison of the ages of Adam and
Eve---

         a) at Adam's point of view?
         b) at Eve's point of view?
         c) as to their physiological ages?

2, If we take account of the acceleration when the space-ship launches
and turns back, what is the comparison of the ages of Adam and Eve---

         a) at Adam's point of view?
         b) at Eve's point of view?
         c) as to their physiological ages?

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