
Now, it turns out that the most common type of star in the Universe is not a star like the Sun, but one about 1/10th its mass. The particularity of these very-low mass stars is that they are much dimmer: They burn their candle very slowly and live about 1000 times longer than a star like our Sun. Thermonuclear reactions allow the Sun to shine for about 10 billion years. A star 0.1 times the mass of the Sun, on the other hand, lives for 10 trillion years. This offers plenty of opportunity for life to emerge in the future around the \href{https://www.authorea.com/10997}{habitable zone} of stars smaller than the Sun. These stars will still be shining when no more star formation is ongoing in the Universe and stars like our Sun are long gone.
