Then again this is set far enough in the future,why not have the technology that would terraform whatever planet they finally chose to settle on? There would be ways to take hostile environments and use their chemical compositions to make the planet for whatever life form would be needing it.
PLUS if there is going to be genetic modifications, perhaps each being that will be placed on certain planets can be altered to live in the already established environments.
Habitable planets
Then again this is set far enough in the future,why not have the technology that would terraform whatever planet they finally chose to settle on? There would be ways to take hostile environments and use their chemical compositions to make the planet for whatever life form would be needing it.
PLUS if there is going to be genetic modifications, perhaps each being that will be placed on certain planets can be altered to live in the already established environments.