Okay let me straighten this out for you guys:
The map editor will only allow the creation of Land/Space maps. In order to make new galatic maps, you have to edit the .XML files. Technically you will be able to add new planets to galatic conquest modes but you will have to edit the .XML to do so.
If you want more information on how to add planets to the galatic view, I would suggest making a thread in the modding section.
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