Interestingly, our sun won't explode. Heavier stars that are about 10 times heavier than our sun explode in what's called a supernova, but our sun is too light for that. Unfortunately for people on Earth though, our Sun will slowly consume its fuel in about 7 billion years, and then it expands and releases a lot of gas, which will likely destroy most of the planets around it. After this, what will be left of the sun is a dense ball of carbon and oxygen that will cool down like any other rock.

All of this is a long way away though, in a bout 7 billion years. All civilization has been around for about ten thousand years, which means we could repeat all of human civilization almost a million times before the sun dies. Here's another way of thinking of it: the pyramids are old, with the oldest one having been built around 4600 years ago. If you imagine that _all_ the time between now and then (4600 years) is just 1 minute in this strange unit of time, then the sun won't die for another 3 years of that time. There are a lot of minutes in 3 years.