These are the most frequently used words in this book.
1991
1992
1993
1994
1995
1996
above
age
al
although
appear
between
branch
chapter
clouds
clusters
color
current
data
differences
different
discussed
disk
distance
distribution
dwarf
dynamical
effect
ellipticals
et
evidence
evolution
expected
field
figure
form
formation
formed
found
function
further
galactic
galaxies
gas
gclf
gcss
given
globular
gradients
halo
higher
horizontal
however
important
large
likely
lmc
luminosity
m31
magnitude
mass
may
mean
merger
metallicity
milky
models
ngc
number
objects
observations
observed
old
picture
population
problem
process
profiles
properties
provide
radius
results
section
see
seems
significant
similar
since
spirals
stars
stellar
studies
suggests
systems
thus
time
two
values
variations
young