The classification of stars

The stars have diferent colors. Astronomers can tell  the diference among the stars dipending on the stars heat.

The hotter stars will going faster and this causes their life span to be shoter.

-The blue stars are the hottest and they are about 20.000 degrees celsius.

-The white stars are about 10.000 degrees celsius.

-The yellow stars like the sun are about 6.000 degrees celsius.

-The orange and red stars are the coolest stars. They are about 3.000 degrees celsius and 4.500 degrees celsius.

The life of a star:

The life of a star starts in a cloud of gas and dust called nebulosa.

There are stars in our univerese of different ages since there are stars being  born at all times and otherones diging.

Our star, the sun is about 5.000 millions years old. It is in the middle of its life cycle.