Astronomers have calculated the odds that, sometime during the next 50 years, a supernova occurring in our home galaxy will be visible from Earth. The good news: they’ve calculated the odds to be nearly 100 percent that such a supernova would be visible to telescopes in the form of infrared radiation. The bad news: the odds are much lower — dipping to 20 percent or less — that the shining stellar spectacle would be visible to the naked eye in the nighttime sky.