Syzygy (astronomy)

Syzygy (also Syzygium, plural syzygies, gr - lat. , Joining ' of gr syzygia, team ') referred to in astronomy a position to stand at the sun and moon, or one of the planets at the same geocentric ecliptic longitude. In heliocentric view takes the Earth, which then has the same heliocentric ecliptic longitude as the Earth's moon or one of the planets in the place of the sun, for example. It is a collective term for opposition and conjunction. The three brought in relation celestial bodies are generally in a common plane which is perpendicular to the ecliptic plane. The intersection of the two planes is called Syzygienlinie.

Is the moon on the ecliptic plane ( center points of the earth, moon and sun on a common line ), so are the best positions for a solar eclipse or a lunar eclipse. The moon happens in these cases, the line of nodes, which is the intersection between the plane of the lunar orbit and the ecliptic plane.