hi 3doid,
thanks for the question, its a good one! - this is the hard part of my visualisation, in the ‘revelation space’ story im basing this upon, the older civilisation (Amarantin’s) who were originally on this recently human colonised planet had left various intriguing artefacts, which I was going to try and suggest somehow with un-natural structures or ‘canals’ like on mars heheh. Obviously I am going to have to differentiate this from the colonists structures in some way. I guess the colonists would need ‘bio’ spheres or artificial air and the original inhabitants wouldnt have…
Also the reason this race was ‘wiped’ out in the book was by a much older race called the ‘inhibitors’ who were lets say ‘borg’ like and had won an original universal war millions of years prior and had probed vast regions of the universe in anticipation of any fast growing space-fairing civilisations that eventually would spring up .
These ‘inhibitors’ had converted a nearby (in the Amarantin’s solar system) nuetron star into a kind of ‘calling card’ for curious space travelling species to visit, at which point it would activate its own defense mechanisms, learn about that species and ultimately wipe them out entirely. This will be hard to visualise as in the book it was pretty far away from the colonised planet and only seen as a ‘star’ like say mercury is from earth. So some artistic license will have to be applied.
my initial thought was to have debris in orbit but it would again be hard to differentiate visually that this was not the human colonist’s own doings. My initial thought it to suggest some kind of larger death star structure but im going to have to think about this one. any suggestions are more than welcome! 