How stars evolve

Stars take a va­ri­ety of form through­out their lives

All About Space - - Quark Stars -

Su­per­giants If the star be­gins life big enough, nor­mally above ten so­lar masses, it will become a su­per­giant.

They can be thou­sands of times big­ger than our Sun.

Main se­quence stars These range from be­tween 0.08 and 10 so­lar radii, with masses around 0.1 to 100-times the Sun. Our Sun is a main se­quence star.

White dwarfs Stars with less than 1.4 so­lar masses will not end their life in a dra­matic ex­plo­sion, in­stead they leave be­hind a small core of elec­tron-de­gen­er­ate mat­ter known as a white dwarf.

Neu­tron stars (off chart) Stars be­tween 1.4 and three so­lar masses will end their life in a dra­matic ex­plo­sion, or su­per­nova, leav­ing be­hind a neu­tron star.

Quark stars (off chart) Stars slightly too heavy to re­main sta­ble as neu­tron stars could po­ten­tially turn into quark stars.

Giants

When main se­quence stars use up all of their fuel, the ex­pand to become giants. Our Sun will become a

Red Gi­ant in around 5 bil­lion years.

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