Unless we use the "Delta Vega" fudge factor and decide that even when the Milky Way in Trek is the same as ours, the folks there named and numbered their stars differently...
Of course, the Trek Milky Way could also simply be different.
As for the supernova blast radius, it seems the wave that destroyed Romulus was low sublight - not only from the visuals of it hitting and pulverizing the planet, but also from the visuals showing how Spock attacked it from the outside while his small craft was at apparent sublight. A faster wavefront of death (either lightspeed gamma, or then FTL magico-radiation) might of course have preceded the pulverizing wave. How far this would reach before getting diluted to harmlessness (in case of gamma) or extinguished by magico-physics (in case of, say, delta) is then debatable.
Spock seemed to worry about galactic consequences. He may well have been considering the political angle - but he still thought it worth the while to stop the wavefront after Romulus had been pulverized and all the political consequences carved in stone. Perhaps what he did reduced the radius of the sphere of death. But perhaps it completely prevented any deaths outside the Romulan capital system, and all the following devastation came from the collapse of the government of the Star Empire. A sphere of supernova destruction is not quite explicit in PIC dialogue yet...
Timo Saloniemi
Of course, the Trek Milky Way could also simply be different.
As for the supernova blast radius, it seems the wave that destroyed Romulus was low sublight - not only from the visuals of it hitting and pulverizing the planet, but also from the visuals showing how Spock attacked it from the outside while his small craft was at apparent sublight. A faster wavefront of death (either lightspeed gamma, or then FTL magico-radiation) might of course have preceded the pulverizing wave. How far this would reach before getting diluted to harmlessness (in case of gamma) or extinguished by magico-physics (in case of, say, delta) is then debatable.
Spock seemed to worry about galactic consequences. He may well have been considering the political angle - but he still thought it worth the while to stop the wavefront after Romulus had been pulverized and all the political consequences carved in stone. Perhaps what he did reduced the radius of the sphere of death. But perhaps it completely prevented any deaths outside the Romulan capital system, and all the following devastation came from the collapse of the government of the Star Empire. A sphere of supernova destruction is not quite explicit in PIC dialogue yet...
Timo Saloniemi