We have ourselves another [long weekend] mystery:
Not when.
Not where. . . we know those answers — 6,000 light years off, in Gaia.
But. . . precisely. . . how?
How, in 4200 BCE, did this nearly rectangular set of shockwaves. . . remarkably evenly spaced, and thus precisely. . . periodic, in time. . .
Come to be — in a Universe absolutely. . . dominated by near-circles. . . or slight elipses.
We should see. . . at least roughly circular, or spiral. . . arms — but we don’t.
How?
How — indeed?
नमस्ते