The result will be that, instead of the Earth describing the half-circle _E_ _D_ _C_, it actually describes the part of the ellipse _E_ _F_ _C_. Thus it can be seen that while the sun is travelling through space, it is at the same time giving rise to the electro-magnetic Aether waves, which, by their repelling power, repel the Earth from the sun in the direction that the sun is travelling, and hence the half-circle is elongated into that part of the elliptic orbit known as the perihelion, which is that part of the orbit where the distance of any planet from the sun is the least. [Illustration: Fig: 26.] The repelling power of the Aether waves is not, however, sufficient to overcome altogether the centripetal force in conjunction with the Earth's motion, with the result that when the Earth arrives at _F_, its distance is only 91 million miles, that being the least distance between the sun and the Earth. We shall see the result of this decreased distance when we deal with Kepler's Second Law. We will now proceed to notice the effect of the sun's orbital velocity upon that part of the Earth's orbit which includes the aphelion, or that part in which the Earth occupies a position of the greatest distance from the sun. Proceeding on the same method of reasoning, if the sun were stationary, with the Earth being circled round it by the electro-magnetic Aether currents, then the path described by the Earth would be that of a circle, being represented by the half-circle _C_ _G_ _E_ (Fig. 26). But it has to be remembered that while the Earth is being circled round the sun by the rotatory electro-magnetic Aether currents, the sun is still travelling on towards _S_ _F_ at the rate of 18,000 miles per hour, while the Earth is travelling in almost an opposite direction towards _C_ _G_, so that by the time the Earth has got to _G_, which we will suppose is one quarter of its ellipse, the sun has travelled millions of miles in that time. Thus it can readily be seen, that by the time the Earth has got to its aphelion, it is at its furthest distance from the sun, simply because the sun has been travelling onwards through space all the time, while the Earth has been receding from it; and as the motion of the Earth has been in an opposite direction, the mean distance has been exceeded, and instead of the Earth being now at its mean distance from the sun, its distance is now 94,500,000 miles. At that part of its orbit, its orbital velocity is at a minimum, because the rotating Aether currents have there a decreased flow and a decreased mass and density, and therefore possess a decreased kinetic energy or motive power.