Could one tell one where one is or us (if preferred) location wise in relation to the initial beginning ? If not and point is unknown all else in recognition of any other point remains an unknown (imho)
Good point. There could be beings just as far away, with a telescope just as powerful, who are looking at us as the furthest away they can see. The Milky Way is supposed to be ~13.6 billion years old. Light can travel a long way in 13 billion years.
Astro mechanics can indicate the future position of stars based on the math. If they can predict where they are going, they can also calculate where they came from.
It’s not really rocket science, although it might be a prerequisite.