Pretty sure if we can make a sun we will be able to stop this one from exploding or we will have a way to absorb the insane amount of energy generated from that explosion without any damage to anything in our solar sistem. To be fair that's a long time, if we still exist at that point I expect our technology to be so advanced that we would be literally god's. To be fair with our current understanding of physics it seems impossible for such technology to ever exist but a few hundred years ago cars and phones were also impossible and any technology advancements were seen as sorcery. So who know what we might learn that could change everything on the future!