Flotsam

Pieces of flotsam and jetsam floated around in outer space, and came through the Cardiff Rift. (TV: Everything Changes, Captain Jack Harkness) Tonnchenforms only ate bits of flotsam and jetsam. (PROSE: Normality)

Flotsam included spaceships (TV: The Infinite Quest, PROSE: Methuselah) and rockets. The Second Doctor told Jamie McCrimmon that in the Silver Carrier, they were "just a piece of space flotsam". (TV: The Wheel in Space)

After the Infinite was destroyed, it became flotsam spread over half the galaxy. (TV: The Infinite Quest)