How do stars differ from each other?

Astronomers divide stars into five main groups according to their size.They are grouped according to their life span.

They are the largest stars.

Examples are Antares and Betelgeuse.

Antares has a diameter that is 330 times

than the sun. Betelgeuse has a diameter

of 375 to 595 times that of the sun.

They have diameters that are about 10

to 100 times larger than the sun's. Aldebaran

has a diameter that is 36 times that of the sun.

They are as big as the sun. Other stars

in this group are Altair,Sirius,and Rigel.

They are the small stars. The smallest

dwarf is Van Maanin's star. It has a diameter

of 8 370 km,less than the distance across Asia.

They are the tiniest stars. Their mass

is less than that of the sun but are so compact.

Their diameter is about 20 km.