1967 R50/2: Good points about how could they know about the contellations if the lost tribe was indeed lost and never heard of again?
My opinions on that:
1. The gods may have brought back this information to Kobol, and they locked this into the 'map room' on the tomb.
2. The thirteen tribes always identified themselves via the signs of the zodiac - and when the 13th tribe landed on earth, they made the contellations 'fit' to they could 'see' the other tribes up in the sky.
Still doesn't answer how the map was brought back to Kobol -- hmmm - I wonder if mabe the cylons have something to do with that....
Definately a show that has some many levels - really makes you think about stuff...
-Z.