3 ms·
Not an astrophysicist, but I think the assumption is that all of the photons are emitted at once in an explosion, and of course they all travel at the same spee
by post-it 4y ago
Not an astrophysicist, but I think the assumption is that all of the photons are emitted at once in an explosion, and of course they all travel at the same speed. So if the burst is two minutes long, the near side of the explosion was two light-minutes closer than the far side of the explosion.