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Glossary

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I


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Ingress

Ingress refers to a planet entering a sign of the zodiac.

The Sun makes an ingress into the Cardinal Signs at the equinoxes and the solstices.


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Invariable Plane

The Invariable plane is the central plane of our solar system. It passes through the Solar system's centre of mass and it is inclined about 1°35' to the ecliptic.