When the Moon is on the side Earth away from the Sun, the light is reflected back up to Earth's night side, which is in shadow.
(the Moon; is; on the side; L:away from the Sun) (the light; is reflected; back up to Earth's night side; T:When the Moon is on the side Earth away from the Sun) (Earth's night side; is; in shadow)
the Moon the light Earth's night side
is is reflected is
on the side L:away from the Sun
back up to Earth's night side T:When the Moon is on the side Earth away from the Sun
in shadow