After 25 clicks on the sun, it collapses and sheds some of its mass, which you can then harvest. Supernova is basically a rebirth which quadruples your starting multiplier.
The year is 2169, and Earth’s population has finally reached 100 billion. All the coal has been used up, so humans turn to the stars. You are one of the brave scientists sent to harvest the power from the stars. Harvest the solar energy and expand your operations quickly, because the future of Earth depends on it.