Orange dwarfs

K-dwarf stars are middleweights of the galaxy, sitting right between small red dwarfs and stars like our Sun. They have a mass between 60% and 90% of the Sun and burn their nuclear fuel slowly and steadily. If the Sun were a fast-burning campfire that lasts for 10 billion years, a K-dwarf would be a long-smoldering log, shining stably for up to 70 billion years. Because they emit less harsh radiation than red dwarfs and outlive yellow suns, their planetary systems are often considered prime locations in the search for alien life.