The boisterous life of stars

All the stars are like us : they are born, live and die.

But, for them, this life has no common measure with ours, neither in time, nor in energy : the estimated lifetime of our Sun, for instance, is believed to be greater than 10 billion years.

The whole life and the death of a star is dependent upon its initial mass, with only a tiny bit dependent on its chemical composition.

You can find a great number of types of stars.
Their mass can vary between 1/10th and 50 times the Solar mass ; their size between 1/400th and 1000 times, and their surface temperature between 2000 and 50.000 degrees.

For a star, its birth begins in a gas cloud. In its infancy, it's called a protostar, then it spends the greatest part of its life on the main sequence. At its end, it undergoes a disproportionate inflation as a red giant. Then it dies as a white dwarf, a neutron star or a black hole.

I invite you to discover this life, which is seldom quiet and often stormy. Along with the pictures, you can also discover some of the wonders of our universe...



Stars scribble in our eyes the frosty sagas,
the gleaming cantos of unvanquished space.

Hart Crane (1899-1932)