Here is a list of what will (and will not) go into a Debris Field.
From the Defenders viewpoint:
- Destroyed attacking ships will go into your debris field.
- Destroyed defending ships will go into your debris field.
If you get hit with IPMs(Interplanetary Missiles) the debris does NOT go into your debris field. It gets vaporized.
And remember, you have a 70% chance that your defenses will be rebuilt. Of course, anything destroyed by IPM’s are vaporized, so they won’t get rebuilt.
Any buildings you destroy (deconstruct) will not be added to your debris field.
UPDATED: Per clarification from some players. If anyone knows of anything else that does (or doesn’t) go into a debris field, let me know.