From the designer...
"This brass puzzle was first introduced to me by Prague's Professor Bakalar. I borrowed it in Atlanta and returned it to him in Luxembourg half a year later. While in my possession, I managed to replicate it, with full permission, of course. This Cast Puzzle version may be even better than the original. "
It definitely remains one of the more amusing puzzles.
The key idea with this one is its "cage". NOB
You must free the star from the cage imprisoning it!