Living
in
a
weightless
____________________
for
long
periods
of
time
can
also
result
in
bone
mineral
loss
and
____________________
____________________
as
well
as
dangerous
____________________
to
the
sun's
radiation
,
and
it
is
because
of
these
health
hazards
that
stays
on
the
International
Space
Station
are
____________________
to
six
months
.
