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Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance.

Hubble sequence is a morphological classification scheme for galaxies invented by Edwin Hubble in 1936.

he divided the galaxies into 1) elliptical galaxies

2)Spiral galaxies

3)Lenticular galaxies

Source:wikipedia

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Q: Why are the galaxies divided into three major types?
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