Hi, I am wondering how to describe a position of our solar system to some other extraterrestrial intelligence in some distant galaxy to find us? Is it possible or not? i mean if such guidance exist for any galaxy or they have to track back movement of your probe or spaceship etc. and some coordinates are not helpful at all. I mean if you want to send a thousand of "near-the-speed-of-light-spaceships" to every direction possible (within 1000x limit) so after a hundred or thousand years they arrive to many galaxies and if the ETI find this probe, how can they track it down to the place of origin? What should be on the "ETI-invitation-info-message"? Is there a way of universal coordinates/position no matter of where the receiver will be (up,down,left,right,front,back etc.) or this is imposssible to achieve. Thanks in advance.