User blog comment:Brianbreed/The Biggest Single Plot Hole in Mass Effect 2/@comment-1823873-20111008234803/@comment-86.134.246.128-20111009080803

The galaxy is mostly empty space, even in dense star clusters or the galactic core Even if their location was packed with stars and black holes there will still be enough vacume for a safe jump into the nothingness to avoid the explosion.