Originally posted by Endless Mike
You know that even if all of the stars and planets in a galaxy were destroyed, the matter and energy that they were made of would still be there, unless something actually took it and removed it from the area where the galaxy used to be.So it would have the same mass and be just as difficult to destroy.
These aren't destroyed Stars and Planets lingering around as formless energy,
these are "Long Dead" galaxies.
No Energy ... hence, lifeless/dead, and perhaps barren.