Not really; if you find a block it will mostly likely have been beaten by someone else's block by the time yours reaches most nodes...unless there is a Saturn based side chain or similar.
This will sound crazy, and I'm not suggesting the consumer would deal with it directly, but I think we'll need coins for each planetary body and another one for the solar system that has a much longer block time. More scales would be useful, but these are the minimum. Repeat for each star, with MilkyWayCoin having an absurd block time.