These are the most frequently used words in this book.
another
appears
arms
astronomer
averted
between
binoculars
bright
brighter
brightest
center
central
chart
cloud
cluster
comet
companions
con
core
dark
diameter
dim
discovered
double
dust
east
eye
faint
field
find
first
form
found
galaxy
globular
glow
herschel
hidden
ht
ic
ing
james
large
lies
light
little
look
low
mag
magnitude
mass
may
milky
million
near
nebula
nebulae
new
ngc
north
northeast
northwest
note
nucleus
object
observers
open
orion
planetary
power
region
rich
ring
round
see
seen
show
sky
slightly
small
south
southeast
southwest
spiral
star
stephen
suns
telescope
ter
though
three
time
treasure
two
type
view
vision
west
william
years