When a small star uses up all the fuel in its core, it collapses into a white dwarf. As a result, clouds of gas and dust are radiated to create a planetary nebula surrounding it. However, some stars become re-energised. That’s happening at the heart of this image, around 5,000 light years from Earth. In the constellation of Cygnus is a planetary nebula called Abell 78. Even though the white dwarf at its centre is no longer burning helium and hydrogen, thermonuclear runaway is ejecting material from its surface. This has swept up the gas and dust of the planetary nebula to create an irregular shell. This image was captured by Hubble and PANSTARSS.