There are stars, nebulars, and black holes in the starchart. Limited communication speed. Sol systems can contain more than one planet. Each planet has a certain amount of biological and mineral resources. Scientist must be trained and are very valuable.
Starships are containers which can contain an amount of features.
Each player makes his moves before end of the turn. Players make their moves when they feel for it. You can give order lists for sereval years. Trade, diplomacy and spionage should play a greater rule in wormhole than in other strategy games. Although you could win through pure military power, you also should have a chance to win with other 'tools'.