My second (and first successful) try of the orion nebula. Any advice for editing out the noise and these stripes? What are these?

Camera: Panasonic Lumix G85 Lens: H-FSA100300 (100-300mm f4-5.6) Settings: f6.4, ISO 6400, 5"

1020 pics at 5s each + calibration frames

Total exposure: 85 minutes / 1.4 hours