Traveller
Traveller is a science fiction game originally produced by Game Designers Workshop. It is currently produced by Far Future Enterprises. The campaign presented here is influenced by the the Classic Traveller rules and the Striker rules for Traveller miniatures. It uses a science fiction ground combat system to allow for the larger actions in the campaign.
Also included is a slightly modified version of the rules published by BITS UK called Power Projection Fleet and Power Projection Escort. These are based on the Full Thrust system by Ground Zero Games. The changes to this system are just to allow it to be used with the smaller ships. The SSDs (ship system displays) are for this game.
There is also a Squadron Combat System for this campaign which is for faster resolution of actions between squadrons.
Credit: NASA/CXC/UCLA/MIT/M.Muno et al.