Picture- O class star

The blue light is an
O class star

The death of a star

After a certain amount of time, a star runs out of hydrogen. The size and class of a star decides how long a star lasts, with the M class stars lasting the longest and O class dying the fastest. Anyway, when the hydrogen stores are depleted, it will move on to helium, and burn that, until it reaches the element iron, which starts the death.

The type of death depends on its size and class. M and K classes just fizzle out, but G and F expand into one hundred times its size before shrinking into a white dwarf, but the big stars- A,B and O have very violent deaths. The core expands until the outer material of the star explodes into space. Sometimes the core collapses to become a neutron star. This is a supernova. Another possibility is a black hole. This is when a star collapses under its own gravity!

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