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Overview of the Milky Way Galaxy
Luminous (stellar) Mass:
Dynamical Mass (total)
Number of Stars:
Galaxy Type:
3x1010 Msun
2x1012 Msun
~1011 stars
Spiral (Sbc)
(<m> = 0.3 Msun)
Friday, March 18, 2011
Milky Way (infrared image)
Friday, March 18, 2011
Andromeda Galaxy (M-31)
M-32Satellite
Satellite galaxyNGC 205
Friday, March 18, 2011
Friday, March 18, 2011
M-104 (spiral with prominent bulge)
Photo: Russell Croman
Friday, March 18, 2011
NGC 2841(4-band HST image)
Friday, March 18, 2011
NGC 4710(note box orbits in bulge)
Envelope of “box orbits” appears as X-shape
Friday, March 18, 2011
NGC 5584(Hubble
Cepheid study)
Friday, March 18, 2011
Another Spiral Galaxy
Friday, March 18, 2011
Edge-on Spiral(NGC 4013)
Friday, March 18, 2011
Barred Spiral (Hubble image)
Friday, March 18, 2011
NGC 1365(largest barred spiral)
200,000 light yrs across (taken by ESA/La Silla
1.5m telescope)Friday, March 18, 2011
IC-10 (dwarf galaxy)
D ≈ 500-700 kpc
Friday, March 18, 2011
Leo I Dwarf
Friday, March 18, 2011
Sagittarius Dwarf
Friday, March 18, 2011