Not round circle with two centers.

In mathematics, an **ellipse** is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve. As such, it is a generalization of a circle, which is a special type of an **ellipse** having both focal points at the same location. The shape of an **ellipse** (how "elongated" it is) is represented by its eccentricity, which for an **ellipse** can be any number from 0 (the limiting case of a circle) to arbitrarily close to but less than 1.

**Ellipses** are the closed type of conic section: a plane curve resulting from the intersection of a cone by a plane. **Ellipses** have many similarities with the other two forms of conic sections: parabolas and hyperbolas, both of which are open and unbounded. The cross section of a cylinder is an **ellipse**, unless the section is parallel to the axis of the cylinder. Wikipedia, Ellipse

"At the left of the drawing two particles are turning upon their gravity shafts which could be electrons, planets or suns. Around these spinning masses are circles with arrows which show the direction of their turning. Naturally these circles show as an **ellipse** because they follow equators and are shown in perspective." [Atomic Suicide, page 295]

See Also

**Apsidal**
**Apogee**
**eccentric orbit**
**Figure 9.7 - Two Centers Showing Complex Attraction Dynamics**
**off-center flywheel**
**Orbital Plane**
**Perigee**
**Prolate**
**Quantum Arithmetic Elements**
**Quantum Arithmetic**
**Sphere**
**two centers**
**two controlling points of stillness**
**two dividing poles**
**two lights of the spectrum**
**two opposed electric forces**
**two points of stillness**
**two poles**
**two-way compression-expansion sequence**
**two-way divided effects of motion**
**two-way effect**
**two-way extension of a point in space**
**two-way motion**
**two-way opening and closing universe**
**two-way universe**
**12.38 - Orbital revolution**
**9.23 - Circular Harmonic Orbit**
**9.24 - Elliptical Enharmonic Orbit**