Introduction (cont'd)
Some galaxies are referred to as early type and some as late type. This is a somewhat awkward way to name them since it can lead to the misunderstanding that some galaxies are previous forms of others. There is much debate how galaxies evolve and whether they change type during their lifetime. Today it is safe to say that at least some ellipticals are results of mergers with other galaxies.
Observing these galaxies gives rise to a lot of questions, like how come that spiral galaxies stay spiral? How come that stars at the edge of the galaxy rotate faster then expected? The presentations gave us possible answers to these questions and more.
We also discuss relatively small galaxies (dwarf galaxies) and galaxies further away, when the universe was younger then it is now.
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