What Happens To Earth When The Sun Dies? by International Business Times Stars are born and die all the time, but what happens if the Sun in our solar system is the one that dies? Apparently, it will expand into a red giant and vaporize the Earth. The Sun won't die anytime soon as it is estimated to go out in around 7 to 8 billion years from now. However, the topic of such an essential part of life dying has always fascinated humans and will probably continue to do so in the future, mainly due to the fact that we know we will all disappear the moment the Sun isn't there anymore. So what exactly happens when the Sun dies? First, we need to look at how stars are born. These celestial bodies are created out of a collection of gas, mostly hydrogen with some helium and other elements, according to Live Science. The massive amounts of gas eventually collapses in on itself under its weight, creating enough pressure to heat up the gas within the interior of the proto-star...