Galactic Evolution. AST 112. Four Types of Galaxies. Spiral Elliptical Lenticular Irregular Why?. Hubble Sequence. The Hubble Sequence suggests a path of evolution for galaxies. The Hubble Sequence is ABSOLUTELY WRONG! (But good first try.). Formation of Galaxies.
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The Hubble Sequence suggests a path of evolution for galaxies.
What determines whether a galaxy willbecome a spiral or an elliptical?
Collisions tend to disrupt orbits and destroy disks in spiral galaxies.Regardless of what type of galaxy you start with,what type of galaxy likely results from multiplelarge-scale collisions?
What’s goingon here?
Clusters (50-1000 galaxies) do contain spirals but they tend to live on the edges.
Galaxy Groups(5-50 galaxies)are often dominated by spirals.
Here we are in a large spiral galaxy onthe outer edge of the Virgo Supercluster.We orbit a stable, long-lived star.Make sense?