Nah... Our star (the Sun) isn't massive enough to go supernova. ;-) It's maybe worse and there's far more deadly things than our star. But, here we go again. No, we know quite a bit about star observations and it's something that we're pretty confident in - that our star isn't massive enough to do anything more than get really big. Here, I'll explain.... As the Sun transfers the energy inside it, some neat things happen. If I ask you how fast a photon moves, you'd say pretty fucking fast. It takes photons hundreds of years to escape the mass of the Sun - and they speed up as they approach the surface. C is only the speed of light in a vacuum. Photons are also pretty light - so they bounce off shit and will bounce around there for fucking years. Anyhow, the Sun has a finite amount of energy and that energy is going to be moving in the direction of entropy. It doesn't have enough mass to hold itself together. It's actually a pretty small and insignificant star - and an oddity because there appears to have never been a sister star. Most star systems are binary systems. Not so with us. (Some theories exist that it may once have been but those don't have much confidence.) Which means the Sun is going to expand. Math tells us that it's going to get almost as large to be able to reach out past the Mercury orbit and somewhere between there and the Earth. There's some debate as to how far. Some math exists that says it will be larger than the Earth's orbit - but that's not something that's well agreed on and most believe it to be smaller. Doesn't matter.... It's going to cook off our atmosphere, bake the planet, and emit enough radiation to assure we're all well and truly dead. Then, our star is going to grow cold and dark. It'll become what's known as a Brown Dwarf, as I recall. I'm kinda stoned, but I'm pretty sure that's the name. Our planet will cool and, over time, will no longer orbit the Sun. Even our moon will finally break free of our grasp and be no more. The moon is steadily moving away from us. I think the distance is like 4 to 6cm per year. I'm too lazy to go look. But, yeah... We're gonna die. It's probably going to be horrible.