The stars have  different  colors. Astronomers   can tell  the difference  among  the stars   the stars depending  on the  stars  heat.  The hotter stars  will going  faster  and  this causes their  life   span to be shoter.

Thebleu starsare hottest and they  are about  20,000c´.The wthite stars  are about 10,000c´.The yellow star like thesun are about 6,000c´. The orange and red stars are the coontest stars.They are about 3.000 C and 4.500 C.The life o a star starts in a cloud of gas and dust called nebullosa.There are stars in our universe of different ages since there are stars being  born at all  temes and otherones diging.Owr star,the sun is about 5.000 millions years old. It is in the middle of its life cycle.