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Astro 10-Lecture 11: Other Galaxies and the Expanding Universe
1920: The Shapley-Curtis Debate
1920: The Shapley-Curtis Debate The Evidence
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Late 1920s: The answer at last
Types of Galaxies
Spiral Galaxies
Elliptical Galaxies
Irregular and Peculiar Galaxies
Classification of Galaxies
ConcepTest
Properties of Galaxies
Another look at the Virgo Cluster
Interacting Galaxies
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Interacting Galaxies Is this how elliptical galaxies form?
cD Galaxies: Cluster Cannibals
How did spiral galaxies form?
Active Galactic Nuclei (AGN)
Active Galactic Nuclei (AGN) Jets
Active Galactic Nuclei (AGN) Radio Lobes
Active Galactic Nuclei (AGN) Bright Blue Nuclei & Emission Line Regions
Active Galactic Nuclei (AGN) Quasars & QSOs (Quasi-Stellar Objects)
Active Galactic Nuclei (AGN) Quasars & QSOs
So what is an AGN?
How do we figure out properties of galaxies?
Rule 1: If we don’t know the distance we don’t know anything.
Concept Test
How do we get the distances to farther galaxies?
“Standard Candles”
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Now that we know the distance we can determine size,luminosity, mass,
Dark Matter: Clusters of Galaxies
Dark Matter: Gravitational Lensing
The Expanding Universe
Cosmological Red Shift
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What does it mean?
Galaxy Evolution
Hubble Deep Field
What do we see?
Author: Eric Korpela
E-mail: korpela at ssl.berkeley.edu
Homepage: http://setiathome.ssl.berkeley.edu/~korpela/
Further information: For the educational use of the Vista Astro 10 class only