Jeffrey said:
in GTSM they are all vastly different in age.

Isn't it possible that everything in the solar system came together at the same time, but that the smaller stars (e.g., Earth, Venus, etc.) burned out first, while somewhat larger ones (e.g., Jupiter, Saturn) are still in the brown dwarf stage, and the heaviest one (i.e., the Sun) is in the prime of its youth, having much more fuel than the others? In other words, if you put two logs on the fire, one big and one small, the small one will burn out first, while the big one will take a little longer. They'll both look the same in the end, but "age" is relative to how much fuel they had.