Comment Re:Its 3000 ly away (Score 4, Informative) 41
Yes, and no. Yes, if you work off the model where there is a universal "now", and light just happens to travel at some high speed. In that model, the explosion happened, and we are now just waiting for the light to finally arrive. However, the problem with that model is that there is no universal "now".
So no: The speed of light is not related to light. Light travels at that speed, but there is nothing about the properties of light that somehow determines that speed; other things, such as gravitational interactions, travel at that speed as well. That speed is not just some arbitrary speed limit, but rather the speed of causality, full stop. There is nothing at point A that can even influence point B in less time. This is what determines our past light cone, or rather, our past causality cone.
And to be clear: this star's bright light-up is not in our past light cone, and so, for us, it did not yet happen.