Normal Galaxies - Hubble
Classification
4 Types:
Spirals – classified by size of central bulge
Ellipticals – classified by shape
Some Properties of Normal Galaxies
Measuring the distance to galaxies
Measuring the distance to galaxies
Nearby structure – the Local Group
Large-scale expansion of universe :
- and even larger scale structure
large scale structure in the universe
Active galaxies – Interacting/Colliding?