Ellipses are defined as curves that surround two focal points. At any point on the ellipse, the sum of the distance to both ...
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New study suggests Earth has several hidden moons from collision billions of years ago"Circumbinary orbits that are polar or highly inclined to the Earth-Moon orbit are subject to two competing effects: nodal precession about the Earth-Moon eccentricity vector and Kozai-Lidov ...
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