Mysterious 'Wave' of Star-Forming Gas May Be the Largest Structure in the Galaxy

Jan 3, 2020
Apparently "the team's paper offers no speculation about the event that could have created the Radcliffe Wave" - so we are free to do it - but the closeup shows a hole in the wave at its center [ ]. If a dark matter lump punched a hole in a star structure (here the galactic disk) to leave a sinusoidal perturbation, it would not be the first suspected such, e.g. the GD-1 star stream event [ ].

FWIW, the first link has a reference to Gould's Belt [ ].