What
are
galaxies
?
1
.
-
Stars
move
around
the
center
of
their
____________________
in
the
same
way
that
planets
orbit
a
star
.
2
.
-
Galaxies
differ
in
size
,
age
,
and
____________________
.
3
.
-
A
whirlpool
-
shaped
galaxy
is
a
____________________
galaxy
,
a
football
-
shaped
galaxy
is
an
____________________
galaxy
,
an
one
with
no
regular
shape
is
called
an
____________________
galaxy
.
4
.
-
Our
home
-
galaxy
,
the
Milky
Way
,
is
a
____________________
galaxy
.
What
was
the
big
bang
?
5
.
-
Some
of
the
light
produced
by
the
heated
gases
of
stars
is
____________________
by
the
star's
atmosphere
.
6
.
-
The
light
absorbed
by
a
star's
atmosphere
drops
out
of
its
light
spectrum
,
forming
dark
____________________
____________________
.
7
.
-
When
a
galaxy
is
moving
toward
Earth
,
the
light
shining
from
that
galaxy
shifts
toward
the
____________________
end
of
the
spectrum
.
8
.
-
When
a
galaxy
is
moving
away
from
Earth
,
the
light
shining
from
that
galaxy
shifts
toward
the
____________________
end
of
the
spectrum
.
