These are the most frequently used words in this book.
aavso
almost
although
astronomers
betelgeuse
between
binary
binoculars
borealis
bright
brightness
ccd
cephei
change
chart
comet
comparison
constellation
coronae
cygni
days
degrees
discovered
during
easily
easy
eclipsing
estimate
even
faint
fainter
few
field
figure
find
first
found
galaxy
get
good
half
hours
image
known
leonis
level
light
long
look
magnitude
maximum
may
minimum
minutes
mira
month
near
new
night
north
nova
now
object
observations
observe
observed
observers
observing
once
orion
orionis
outburst
period
range
red
see
semiregular
should
show
since
sky
small
ss
star
sun
system
take
telescope
three
time
two
type
ursae
use
variable
variation
varies
weeks
work
years