According to the Spanish “abesai” website on August 15, scientists generally believe that the “Big Bang” created time and space, made clocks run, and formed galaxies, stars and planets. But what will happen in the future? Will the universe come to an end? “The universe will be a place of sadness, loneliness and cold,” said Matt Kaplan, a theoretical physicist at the University of Illinois. This is what people call “heat death.” the main components of the universe will be black holes and depleted stars In an article expected to be published in the monthly journal of the Royal Astronomical Society, Kaplan estimated when the universe would become dead. For this reason, Kaplan estimated the possible time of the last supernova explosion. The so-called supernova explosion refers to a violent explosion that usually occurs when a massive star runs out of fuel and collapses. According to Kaplan’s prediction, the explosion will occur years after the 32000 power of 10 (that is, there are 32000 zeros after 1, which can’t be written on a piece of paper). However, Kaplan’s estimate does not describe the death of massive stars. They may have died a long time ago: as we look around now, big stars aggregate heavier and heavier elements until they become iron. Iron can no longer aggregate and accumulate in the interior of the star, eventually causing the star to collapse and explode. < / P > < p > as a result, at the end of the day, there will be smaller stars left, not supernova explosions, but white dwarfs: that’s the fate waiting for the sun. What does a white dwarf look like? It’s basically the extinct core left by a star that has lost its shell. < / P > < p > in theory, these nuclei gradually cool over time and become black dwarfs. “As white dwarfs cool, over the next few billion years, their brightness will gradually weaken and eventually harden into black dwarfs that do not emit light,” Kaplan said Black dwarfs are composed of light elements such as carbon and oxygen, which are about the same size as planets. But unlike planets, they reach the mass of a star. < / P > < p > but even if a black dwarf is formed, it won’t end. Kaplan said that due to the quantum tunneling effect, fusion reactions will continue to occur in the interior of the black dwarf. So even black dwarfs produce iron and eventually accelerate supernova explosions: what Kaplan calls “black dwarf supernovae.”.