Galaxy
:
Huge
collection
of
____________________
,
dust
and
gases
,
held
together
by
the
____________________
force
.
Our
galaxy
is
the
____________________
Way
,
it
belongs
to
the
____________________
Group
galaxy
cluster
.
Star
:
Massive
spherical
____________________
made
of
____________________
and
____________________
.
Some
have
____________________
systems
made
of
planets
,
____________________
,
asteroids
and
____________________
.
The
____________________
is
our
star
,
it
?
s
a
____________________
-
sized
star
.
Planets
Spherical
bodies
which
____________________
(
revolve
around
)
,
some
stars
.
They
do
not
emit
____________________
.
Some
have
satellites
____________________
around
.
They
all
move
in
____________________
orbits
.
Solar
System
:
It
is
our
____________________
system
.
It
consists
of
:
-
The
Sun
:
a
____________________
.
-
Planets
:
____________________
____________________
planets
:
Mercury
,
____________________
,
Earth
and
____________________
.
____________________
____________________
planets
:
____________________
,
Saturn
,
____________________
and
Neptune
.
____________________
planets
:
Pluto
,
____________________
,
Eris
.
-
Small
solar
system
bodies
:
satellites
,
____________________
and
comets
.
Satellite
:
____________________
bodies
which
revolve
____________________
planets
.
The
Moon
is
our
____________________
satellite
.
Asteroid
:
Small
____________________
bodies
which
____________________
the
Sun
.
Some
form
____________________
like
the
____________________
belt
between
the
orbits
of
____________________
and
Jupiter
,
or
the
____________________
belt
beyond
Neptune
.
Comet
.
Masses
of
____________________
,
dust
and
gas
found
____________________
the
orbit
of
Pluto
.
When
they
travel
____________________
to
the
Sun
,
the
____________________
evaporates
and
creates
a
long
____________________
tail
.
