Alain <ele### [at] netscapenet> wrote:
> >
> It's 20 lightyears away from HERE.
>
> A planet orbiting it's sun at a 20 lightyears radius would need to have an
> extra-galactic sun, or get snatched away by nearby stars. Such a planet would
> also be frozen solid, with, maybe, sone seas of liguid hydrogen and helium. It's
> "year" would last several 100's of millenias.
>

Just for fun, I made the calculation for a star with the same mass as the sun:
following Kepler's thrid law the planet would orbit the star once every 1.4
billion years at a speed of 26 m/s (95 km/h), which IMO is still surprisingly
fast, about 1/1000 of the speed of earth.
Like you said it would have to be a solitary star, but that shouldn't be a
problem, there's a lot of space out there. Pun intended :-)

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