Board Thread:Fun and Games/@comment-24281314-20141224003820/@comment-24580134-20150402215453

AzureAzulCrash wrote: Unfortunately, the sun went supernova.

Fortunately, Edinians from planet Eden give the humans a space in their society! The Sun does not have enough mass to explode as a supernova. Instead it will exit the main sequence in approximately 5.4 billion years and start to turn into a red giant. It is calculated that the Sun will become sufficiently large to engulf the current orbits of the Solar System's inner planets, possibly including Earth.

Even before it becomes a red giant, the luminosity of the Sun will have nearly doubled, and Earth will be hotter than Venus is today. Once the core hydrogen is exhausted in 5.4 billion years, the Sun will expand into a subgiant phase and slowly double in size over about half a billion years. It will then expand more rapidly over about half a billion years until it is over two hundred times larger than today and a couple of thousand times more luminous. This then starts the red-giant-branch (RGB) phase where the Sun will spend around a billion years and lose around a third of its mass.