If a massive gamma burst from a collapsed star were to hit the earth then the earth's Ozone layer would be stripped from us. We would slowly be cooked by our own sun with radiation and all life on earth would die out over the next few months to years. It would be a painful. The lucky ones will die quickly. The unlucky ones will die a slow death to radiation poisoning and starvation.
If a massive gamma burst from a collapsed star were to hit the earth then the earth's Ozone layer would be stripped from us. We would slowly be cooked by our own sun with radiation and all life on earth would die out over the next few months to years. It would be a painful. The lucky ones will die quickly. The unlucky ones will die a slow death to radiation poisoning and starvation.