The Sun, boiling

A ball with a quarter cut out, so you see the surface and the inside at once. The surface is worked out fresh for every pixel, every frame, on the graphics card. Turn Boiling off and you get what a painted picture gives you.

One finger turns it; pinch to come closer; tap to ask what a part is

The kept picture — Save the picture Close

Core, the inner quarter: about 15 million degrees, where hydrogen burns into helium
Radiative zone, out to seven tenths: light wanders out, bounced from atom to atom
Convection zone, the outer three tenths: hot gas rises, cools and sinks, like a pot on the stove
Granules on the surface: the tops of those rising columns, bright in the middle, dark where they sink