On Tue, Nov 29, 2011 at 10:07, Jeff King <peff@xxxxxxxx> wrote: > However, it may be of interest that the Sun is expected to burn out in a > mere 10^10 years[1]. Off topic, but it's a a lot sooner than that. The total age of the sun is is around 10^10 (10 billion) years, but we're already ~4.6 billion years along that line. However the Sun is currently in a stage of gradual heating until it turns into a red giant in ~5 billion years. In around 500 million years the earth will be uninhabitable as we know it, and in around 1 billion years the surface will be hot enough to have boiled all the oceans. In other words the earth in a billion years will probably look similar to how Venus looks now. -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html