The
____________________
seems
to
be
something
____________________
above
us
,
and
it
includes
many
terms
that
we
must
know
in
order
to
be
able
to
explore
life
outside
our
planet
.
The
milky
way
is
one
of
the
biggest
parts
of
the
entire
space
that
includes
several
solar
systems
.
In
the
center
of
our
____________________
there
is
a
gigantic
star
that
we
know
as
our
sun
,
and
it
is
____________________
by
the
different
____________________
that
we
know
up
to
now
.