You don't have to take a Goddess Energy Initiation with Lady Isis or attend a Cobra Conference to find out you are from Sirius, for example.
There is a website!
A friend of mine shared this with me--it is done online, or by snail mail, and all it takes is like, ten dollars, she says. It will tell your your Star Origin for your last three incarnations. I am getting mine done now. I think there is a Pleiades in there too. I always LOVED that constellation and looked for it every time in the night sky as a child.
Here is the link: http://www.lightconnection.org/Readings/specialtyreadings.htm
Have fun!
Namaste,
Reiki Doc