At this point the star emits radiation intermitantly until it turns into a Black Hole. There is an infinite amount of stars therefore the size of the universe is infinite. It is impossible to have an infinite amount of stars in a limited size universe. With this paradox, the universe is expanding. With Olber's paradox, it states the universe didn't always existed.
Stars take millions of years to be visible on earth.
Since we cant see all of the stars, we can state that the universe didnt existed before.