When the new Moon appears with in 18-3/4 days before or after the alignment of the node, a solar eclipse will take place.
(the new Moon; appears; ) (a solar eclipse; will take; place; T:When the new Moon appears with; T:in 18-3/4 days)
the new Moon a solar eclipse
appears will take
place T:When the new Moon appears with T:in 18-3/4 days