Guess we better use really large stones :-)

You do know that stars move, right? And not even all in the same direction or at an easily predictable speed.

It's illustrative about how hard time is that you tried to create a new system from scratch, with the express purpose of being future proof for space travel, and it's already broken because the fixed point you chose is not, in fact, fixed.

Edit: grammar

I believe that ChuckMcM is making a lighthearted, elaborate reference to Stonehenge. (If not, nevermind!)

It has been interesting to see the responses. And yes it was a not so oblique reference to Stonehenge. :-)