- Morphological classification

* Visual morphologies: the Hubble Tunning Fork diagram

* Quantitative techniques: non-parametric and parametric methods (the Sérsic functions)

-> Morphological evolution across cosmic time

- Galaxy sizes and size evolution

- Galaxy mass (luminosity) function and its evolution

- Galaxy environment

* Our Local Group

* Dwarf galaxies

* Underdensities (voids) and overdensities (groups and clusters)

* Morphology-density relation, Butcher-Oemler effect and environmental processes

- Color-magnitude diagram and galaxy bimodality

- Galaxy metallicity

- Not all that glitters is gold: the galaxy diffuse components --gas (atomic, ionized and molecular) and dust--

- Galaxy kinematics:

* Spirals

* Ellipticals

* Scaling relations