Figure 10. comparison of trail effects predicted by the Density wave theory with the ROTASE model. A: the trail effect with co-rotation circle in the middle region of visible galactic disc; B: the trail effect with co-rotation circle outside of visible galactic disc; C: trail effect predicted by ROTASE model

From

Spiral Arm Formation of Galaxies Through ROTASE Mechanism is Perfectly Demonstrated by Falling Rockets Venting Fuel

Hongjun Pan

International Journal of Physics. 2023, 11(4), 166-173 doi:10.12691/ijp-11-4-1