We can measure the distances to the nearest stars by parallax, that is by the apparent motion of the star in the sky as a result of the Earth's motion round the Sun.
(that; is; by the apparent motion of the star in the sky) Context(that is,List([63, 70))):(We; can measure; the distances; to the nearest stars by parallax)
that is,List([63, 70))
that We
is can measure
by the apparent motion of the star in the sky
the distances to the nearest stars by parallax