Sun may have binary partner which affects the Earth
The movement of the solar system known as the precession of the equinox occurs because the Sun has a companion star; both stars orbit a common center of gravity.
The grand cycle–the time it takes to complete one orbit––is called a "Great Year," a term coined by Plato.
[When it passes through the Oort Belt, it dislodges comets and other bodies, sending them sunward (ie towards us.]
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