It's impossible for it to travel at the speed of light. Nothing that has mass can. However, even if it did travel at such high speeds, it would take 8 minutes for us to see it. Although, if it were traveling at the speed of light, it would catch up with the photons it was emitting and we wouldn't see anything until it was too late. But it still probably travels very fast. We may have a little time to see it. But that's just my guess