A system of million and billions of stars

A galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms

a type of galaxy having an ellipsoidal shape and a smooth featureless brightness profile.

A galaxy that does not have a distinct regular shape

is a small galaxy composed of about 100 million to seven billion stars

The galaxy which the sun and solar system are a part of which contains the myriads of stars that create the light of the milky way