Properties of Galaxies
50%
20%
30%
Fraction
Not a lot
no
Yes
(disk)
Rotation
Still
some
Very
little
Yes
Interstellar
medium
Pop I
(Pop II)
Pop II
Pops I
& II
Stellar
Populations
107- 109
105 - 1011
108 - 1010
Luminosity
bluish
reddish
Blue
arms,
reddish
bulge
Color
103- 105
104- 106
104- 105.5
Size (pc)
1010 ;
108 - 1011
1011.5 ;
106 - 1013
1011 ;
109 - 1012
Mass [typical; range]
(solar masses)
Irregulars
Ellipticals
Spirals
Other galaxy types : Peculiar, Interacting, Ring,
Starburst, Dwarf,
Luminous Infrared, Active Nuclei, Damped Lyman-alpha