> Couldn't you describe any star in such a fashion?

No.

For any range X there is a "youngest star" within that range. The reverse is not true.

Hunt down an oldish game called Colobot. Windows only game. Its a typical "world exploration" game but with one very interesting addition.

You can either control the myriad of robots manually, OR... program in a very C++-like language and let them "have at it".

The game encourages code re-use, so once you've coded a particular operation, you're encouraged to re-use it for subsequent levels.

One of the most fun coding experiences I've ever had.