The sun is becoming 10% more luminous every billion years as it approaches its red giant phase. This is very long term, but in effect it will increase the amoun

The sun is becoming 10% more luminous every billion years as it approaches its red giant phase. This is very long term, but in effect it will increase the amount of heat on Earth over time. The Earth will be uninhabitable long before the sun goes red giant though! About a billion years from now [1]. [1] http://theconversation.com/the-sun-wont-die-for-5-billion-years-so-why-do-humans-have-only-1-billion-years-left-on-earth-37379 http://theconversation.com/the-sun-wont-die-for-5-billion-ye...