Before stars evolve into white dwarfs, they swell up and become red giants.

Later, the star evolved into a blue supergiant, just a few thousand years before the explosion.

The stars have no major effect on each other, and essentially evolve separately.

The star has evolved for 9.41 billion years.

Most stars will evolve above this curve as they age.

Astronomers begin to see that spectroscopy is the key to understanding how stars evolve.

Mammoth stars evolve much more quickly than the sun.

The stars around him did not evolve along ordinary lines.

It isn't accreting material, so we can watch how the star evolves over time.

The stars in our sky are constantly changing and evolving as they consume their fuels.