Linked from
The 19 pages that link to Lunar eclipse, each with the reason it gives.
MoonRelated: A lunar eclipse reveals the Moon crossing through Earth’s shadow.
Draconic monthRelated: A lunar eclipse requires the full Moon to occur near a node.
Spherical EarthRelated: Earth’s consistently curved shadow on the Moon supports a spherical shape.
Eclipse cycleRelated: Lunar eclipses recur within the same alignment framework as solar eclipses.