Ed
Wehling
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Astronomy
Meteorology
Geology
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5. Galaxies and the Milky Way
Primary goals
- Understand how galaxies are a part of the
universe
- Describe the general characteristics of the Milky
Way
- Describe some of the evidence to support the
ideas about galaxies
How is matter distributed in the
universe? [section
23.3 p. 678-681]
- Evidence--How does the Cosmic Microwave
Background provide a link between the Big Bang and today's structure of
the universe?
- How did matter get that way?
- Groups, clusters, superclusters
- Observing galaxies
--supercluster
video--4 min
--Dipole
repeller
Galaxies
- Spiral and elliptical galaxies
[p. 603-604]
Milky Way
- Description
[section 19.1 p. 578-582]
- Stars
- Interstellar matter
--Gas [p. 583-585]
--How can we detect the gas?
--Dust [p. 514-515]
- Spiral arms [p.
591-593]
- Dark matter [p.
668-672]
Explanation D2L
--What evidence did we discuss that suggests that dark
matter exists?
--Link
--interactive
of the effect of dark matter on speeds of stars in a galaxy
- Center of Milky Way [p.
595-596]
--What evidence do we have that a black hole exists
at the center of the galaxy?
Visual delights
[p. 590-591]
- Ionization nebulae (emission nebulae)
- Refection nebulae
- Dark nebulae
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