This glitch is performed by maxing out the cycles of the NES CPU during a specific point in the code's execution during a frame, causing an interrupt that prevents the enemy that spawns the warp from despawning when hit by a bullet. I was able to hit this CPU cycle window 5 times in a row to produce a total of 6 warps to planets 7, 8, 9, 10, 11, and 12.