The old stars probably formed from 12 to 6 billion years ago.

It is thought that almost all other stars form by this process.

This is the reason why stars usually form in clusters.

The two young stars form the sane center of the film.

This is an active star forming region 7,000 light years away.

Some 300 million years later, stars and galaxies formed as well.

It is not certain that these stars form a physical system or whether they are merely aligned by chance.

It was a surprise, astronomers said, to find the stars had formed so early.

Researchers believe this discovery should lead to a better understanding of the entire star forming process.

His work is a step towards a more thorough understanding of how stars and planets form.