----- Original Message ----- From: "Stephen A. Lawrence" <[EMAIL PROTECTED]> To: <vortex-l@eskimo.com> Sent: Thursday, February 15, 2007 10:33 PM Subject: Re: [Vo]: FW: Einstein's Twin Paradox ...
> This is not a paradox, and the "paradoxical" nature of the problem was > in fact resolved something on the order of a century ago. The traveling > twin accelerates; the stay-at-home twin does not; thus, the symmetry is > broken. ... To be more precise the traveling twin is the only one who accelerates _wrt the initial common frame of reference_, that's what breaks the symmetry (otherwise one could argue that they both accelerate wrt each other) Michel
