At the moment I am still working a bit on my new version of the Phalanos
setting, the fantasy - science fiction crossover with magic gates as the
means to travel between worlds.
Today I used the free Celestia planetarium program to get an impression
what the night sky of a planet Phalanos in an orbit around Tau Ceti might
look like, and whether my pseudo-medieval visitors to such a planet would
be able to recognize any of Earth's constellations and would have a chan-
ce to find out where they are now in relation to Earth.
It seems the only easily recognizable well known constellation would pro-
bably be Orion, otherwise the night sky would look rather different, and
Sol (now in Bootes near Arcturus) would be just another comparatively
bright star. With a lot of observations and the star charts built upon them
it should be possible to recognize some other very bright stars and con-
stellations, but I think only a true genius could combine the charts and
identify Sol as the Earth's sun.
Still, perhaps one of the players will find a way to solve this puzzle.