Oval path of a planet around the sub, with the sun at one of the two foci.

a curved line with the sum of the distances from imaginary points (foci) to each point on the curve is constant

An ellipse looks like a slightly flattened circle. A plane curve. Orbits take the form of ellipses.

A closed curve in the form of a symmetrical oval.

A geometrical shape such that the sum of the distances from any point on it to two fixed points called foci is constant. In any bound system where two objects orbit a common center of mass, their orbits are ellipses, with the center of mass at one focus.

A curve such that the sum of the distances from two fixed points, called the foci, to any point on the curve is a constant.

(n) A single-curved line primitive. An ellipse is a conic section produced when a plane is passed through a right circular cone oblique to the axis and at a greater angle with the axis than the elements. An ellipse also describes a circle or circular arc viewed at any angle other than normal (perpendicular).

The set of all points in a plane such that the sum of the distances to two fixed points is a constant.

A geometrical shape that looks like an oval. The orbits of all planets follows the shape of an ellipse.

A closed, oval, plane figure. An ellipse is the path of a point that moves so that the sum of its distances from two fixed points is constant. Each of the fixed points is called a focus of the ellipse.

One of a family of curves produced by rotating a circle around a diameter, and observing the resulting foreshortening. Also, one of the four conic sections.

a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it; "the sums of the distances from the foci to any point on an ellipse is constant"

a circle that has been squashed in one direction, so it looks a bit like an oval

a circle that is slightly stretched in one dimension

a closed curve in which the sum of the distances from any point on the curve to two fixed points called the foci is constant

a closed curve of oval shape

a closed curve similar to a circle

a closed curve that can be formed by the intersection of a plane with a right circular cone

a conic section defined by semi-major and semi- minor diameters, position and orientation

a curve, returning into itself, one of whose diameters is longer than the other

a curve that looks something like a flattened circle

a figure shaped like an oval

a figure that can be defined geometrically or algebraically

a geometric shape similar to an oval

a lot of points for which the sum of their distances from the foci is a constant

a mathematically determined oval

an example of a curve called a conic section

an oval shape, and this roughly describes the path that the feet make when running

a round geometric figure in which a series of points are positioned so that each point has an opposite point on the other side of a common point called the center

a round shape like a circle, but narrower in one direction than in the perpendicular direction

a set of points in the plane, whose sum of distances from two fixed points is constant

a sort of squashed circle with a short diameter (the "minor axis") and a longer diameter (the "major axis")

a special curve in which the sum of the distances from every point on the curve to two other points is a constant

a special sort of squashed circle, in fact a circle seen from an angle

a stretched circle, as shown below

a symmetrical closed curve, of which the transverse and conjugate diameters are one greater than the other

a type of conic section In mathematics, a conic section (or just conic) is a curved locus of points, formed by intersecting a cone with a plane

an oval; an ellipse has two focus points.

A curved planar figure, the locus of all points which have the same total distance from two fixed points called the foci.

with center at ( h,k), major axis of length 2 and minor axis of length 2: Major axis horizontal: Major axis vertical

() A non-normal view of a circle.

A conic section; the curve of intersection of a circular cone and a plane cutting completely through the cone.

is a geometric shape which describes the orbits of both planets and comets. The orbits of planets are nearly circular, while the elliptical orbits of the comets are generally long and narrow.

A closed curve defined by two foci such that the sum of the distance from any point on the curve to each foci is constant. All orbits are assumed to be elliptical.

a part of an oval, a curve produced from two or more centres.

An oval. The fact that the orbits of the planets are ellipses and not perfect circles was discovered by Johannes Kepler, working with the careful observations by Tycho Brahe.

The set of all points in a plane such that the sum of the distances (focal radii) from two given points (foci) is constant.

Geometric figure resembling an elongated circle. An ellipse is characterized by its degree of flatness, or eccentricity, and the length of its long axis. In general, bound orbits of objects moving under gravity are elliptical.

An ellipse is an oval shape. Johannes Kepler discovered that the orbits of the planets were elliptical in shape rather than circular.

a geometric shape resembling a flattened circle

oval. The orbits of the planets are ellipses, not circles. This was first discovered by Johannes Kepler based on the careful observations by Tycho Brahe.

A curve for which the sum of the distances from any point on the ellipse to two points inside (called the foci) is always the same.

An ellipse looks like a flattened circle. It consists of all the points in a plane that satisfy the following: a+b=(twice the length of the semi-major axis), where a is the distance from one focus to the point on the ellipse, and b is the distance from the other focus to the same point on the ellipse.

A closed curve enclosing two points (foci) such that the total distance from one focus to any other point on the curve back to the other focus equals a constant.

A closed shape resulting from the intersection of a circular cone and a plane, resembling an oval. In space, orbiting bodies follow elliptical paths. See also

A closed curve that is formed from two foci or points in which the sum of the distances from any point on the curve to the two foci is a constant. Johannes Kepler first discovered that the orbits of the planets are ellipses, not circles; he based his discovery on the careful observations of Tycho Brahe.

squashed circle that tapers at both ends. The total of the distance between any point on the ellipse and one focus + the distance from the point to the other focus = a constant. It is the shape of bound orbits.

A set of points, the sum of whose distance from two fixed points (the foci) is constant. An ellipse is essentially a circle that has been stretched out of shape. When describing ellipses, the eccentricity defines how "stretched out" it is.

Having the shape of oval or elliptical.

A distorted or elongated circle.

When a parabola is closed off by another curved surface an ellipse is produced.(Basic Science/sound/reflection/discussion012.htm)

Closed path traced by a moving point whose distance form two fixed points (foci) remains constant.

Closed curve produced when a cone is cut by a plane inclined obliquely to the axis and not touching the base. Closed curve plane figure where the sum of distances from any point on the curve to two fixed points remain the same.

An oval. The planets do not orbit in perfect circles, as was believed before Kepler's Laws of planetary motion, but rather in slightly oval (elliptical) orbits. Their eccentricity is low so the orbits are not far off being circles. An ellipse has two foci (plural of focus), in the Solar System, the Sun lies at one of these.

A squished circle (put simply). If you took a regular circle and only changed the height or width, you would get an ellipse.

A somewhat flattened, elongated circle, or oval shape. Planetary orbits were demonstrated by Kepler to be ellipses, rather than circles as had previously been believed.

A special kind of elongated circle. The orbits of the solar system planets form ellipses.

In mathematics, an ellipse (from the Greek for absence) is the locus of points on a plane where the sum of the distances from any point on the curve to two fixed points is constant. The two fixed points are called foci (plural of focus).