The outer layer of the tape expands against the casing.

Its outer layers expand, causing them to cool.

The outer layers of the star then expand greatly, beginning the red-giant phase of the star's life.

As the outer layer expands it makes a red giant star.

The outer layers would expand enormously, driven out by the new-burning core.

The outer layers of the star expand by about 200 times and the core contracts.

These large pressures cause the layer (and the whole star) to expand.

Eventually the outer layers of the star will expand and cool and the star will become a red giant.

The helium-burning layer rapidly expands and therefore cools, which reduces the reaction rate again.

The outer layers expand to compensate for the increased temperature and pressure gradients, so the radius also increases.