Key Words

Hubble Classification
tuning fork diagram
elliptical galaxies
spiral galaxies
barred spirals
irregular galaxies
giant elliptical
dwarf elliptical
peculiar galaxies
galactic cannibalism
clusters of galaxies
superclusters
groups of galaxies
The Local Group
Andromeda Galaxy
Large Magellanic Cloud
Small Magellanic Cloud
Sagittarius Dwarf
rich clusters
poor clusters
Virgo cluster
Coma cluster
dark matter
X-ray gas
baryonic matter
nonbaryonic matter
supersymmetric particles
hot dark matter
cold dark matter
relativistic matter
nonrelativistic matter
The Local Supercluster
Hubble flow
peculiar velocity
The Great Attractor
standard candle
Tulley-Fisher Relation
type Ia supernova
Olber's Paradox
Cepheid variables
galactic red shift
red shift parameter
Hubble Law
Hubble constant
Hubble time
look-back times
pencil surveys
voids
Great Wall
Southern Wall
colliding galaxies
starburst galaxies
Cartwheel Galaxy