How far is the sun from earth?

The Dying Earth subgenre is a sub-category of science fantasy which takes place at the end of Time, when the Sun slowly fades and the laws of the Universe themselves fail, with the science becoming indistinguishable from magic. More generally, the Dying Earth sub-genre encompasses science fiction works set in the far distant future in a milieu of stasis or decline. Themes of world-weariness, innocence (wounded or otherwise), idealism, entropy and the hope of renewal tend to pre-dominate.