[Image: It's the "N44 superbubble complex," and it spans 325 lightyears. But are we drifting dangerously close to another such superbubble? And what would such a cosmic ring sound like? (Thanks, Bryan!) Meanwhile, is the Milky Way – and everything near it – being pulled toward something, a region of "superdensity," a "Zone of Avoidance," the "most massive known structure in the observable universe"? Finally, is this –
– the fate of the sun, bursting over a ruined earth of half-molten continents and liquified alluvial cities 7.5 billion years from now?].