that's all I have at the moment.
Needs a level-sharing feat: X to the Y.
Y = Your Astronomer levels; X = The other Astronomer's levels.
So, since Lord Reginald is an 8th level Astronomer, if CaraVela is a 3rd level Astronomer, then
Lord Reginald's effective Astronomer level becomes 3 to the 8th, and CaraVela's becomes 8 to the 3rd.
If yet another Astronomer is around, X to the Y to the Z. Etc. Multidimensional, of course.
:-( maybe this is overpowered...
On a more serious note, whatever that means in this context, Time Dimensional looks *great* and Spelljammer is definitely coming along, can't wait to see the ability descriptions. Slow BAB is fine for Time Dimensional, by rep they're non-combatants unless pushed hard by circumstance, but considering The Spelljammer's reputation, fast BAB might make more sense...? It should be a terror for its age, at any age.
Also - even though for my purposes this overlaps Time Dimensional - The Spelljammer needs something to represent its prodigious knowledge of everywhere. Not exactly Knowledge The Planes, because it doesn't go to non-Primes for the most part, but probably no other creature type is as well traveled across Primes, or in the Flow.