By classified do you mean genre then it is outer space,planets,stars,suns,moons etc. :}
they are classified by there shape .
About 60% of galaxies are classified as elliptical planets.
Astronomer.
There are four types of galaxies in the universe . A galaxy that has an undefined shaped is best classified as an irregular galaxy. 10% of galaxies are classified this way.
Galaxies are classified by their shape and size. The main kinds are ellipticals, spirals, irregular and dwarfs.
60000
Edwin Hubble Classified the Galaxy different categories depending upon its visual appearance.
Edwin Hubble
are spiral galaxies are generally older than elliptical
Elliptical galaxies are generally old but not very bright
Shape, or morph. The spiral galaxies, elliptical galaxies, lenticular, barred spiral, and irregular galaxies all are different shapes or morphs of galaxies, and so they are classified differently.
There are three types of galaxies, all of which are the same, with the exception of their shapes. There are the Elliptical galaxies (football-shaped) the Spiral galaxies (like the Milky way; vortex-shaped) and Irregular galaxies (all shapes other than spiral and football shaped).