____________________
sailors
are
____________________
to
be
____________________
first
____________________
to
use
____________________
North
____________________
to
guide
their
____________________
.
In
the
Northern
____________________
,
the
North
Star
____________________
to
____________________
still
____________________
other
stars
____________________
to
move
____________________
the
sky
.
____________________
____________________
used
the
____________________
Star's
____________________
to
____________________
their
location
.