When the Earth, Sun and Moon are all aligned, the shadow of the Earth at a full moon covers the face of the Moon, producing a Lunar Eclipse.
(the Earth, Sun and Moon; are aligned; ) (the shadow of the Earth at a full moon; covers; the face of the Moon; T:When the Earth, Sun and Moon are all aligned) (the shadow of the Earth at a full moon; producing; a Lunar Eclipse)
the Earth, Sun and Moon the shadow of the Earth at a full moon the shadow of the Earth at a full moon
are aligned covers producing
the face of the Moon T:When the Earth, Sun and Moon are all aligned
a Lunar Eclipse