A cutaway of the Sun showing its main features: sunspots, flares, prominences, faculae, corona and, internally, its immensely hot core and the convection cells which bring heat to the surface. The core is shown as dark because no light is produced until photons reach the photosphere, by a zigzag route which can take a million years! (Gouache, from Book of the Universe by Ian Ridpath.) Available as an Original (see Original Artworks.)
End of the Earth.
Billions of years from now our Sun will start to expand into a Red Giant. This is a scene near the beginning of this process. Unless we have moved to the planet of another star, mankind will become extinct. (Gouache, from Atlas of the Solar System by David A. Hardy.)
Red Giant Sun
Billions of years into the future the Sun will expand to a bloated Red Giant, eventually gobbling up poor old Earth as it becomes a ball of molten slag . . . (Gouache, from Book of the Universe by Ian Ridpath.)