Before launching Galaxies, lets try and customise the graphics. To do this, login as normal using the SWG client. DON'T LAUNCH THE GAME!
Enter your user name and password. Then select GAME OPTIONS on the left hand side. This will bring up a control panel.
Click the GRAPHICS tab and try the following - Then tick these boxes
Disable Bump Mapping
Use Low Level textures
Try that. then log out, then restart the game and continue, keeping your fingers crossed. If it doesnt work, come back to me.