North Node
DefinitionThe North Node is a calculated point where the Moon’s orbit crosses the ecliptic while moving northward. It is always opposite the...
True Node
DefinitionThe True Node is an astronomically calculated position marking where the Moon’s orbit crosses the ecliptic, the apparent path of the Sun....
Mean Node
DefinitionThe Mean Node is a calculated position of the Moon’s orbital nodes: the two points where the Moon’s path crosses the ecliptic,...
Lunar Nodes
DefinitionThe Lunar Nodes are the two points where the Moon’s orbital path crosses the ecliptic, the Sun’s apparent path through the zodiac....
Saros Cycle
DefinitionThe Saros Cycle is an astronomical period of approximately 18 years, 11 days, and 8 hours that links eclipses with similar geometric...
Hybrid Eclipse
DefinitionA hybrid eclipse is a rare solar eclipse that appears annular from some locations along its path and total from others. The...
