A planet’s revolution is its movement around the sun in a path called an orbit. The planets revolve around the Sun in a counterclockwise direction as viewed from Polaris. Earth’s orbit (and those of the other planets) is an oval shape called an ellipse. Within the ellipse are two fixed points called foci (singular, focus). The sum of the distances between any point on the ellipse and the two foci is a constant; that is, the sum of those distances for one point is equal to the sum for any other point on the curve. The sun is at one of the foci of each planetary orbit in the solar system. The major axis of an ellipse is the longest straight-line distance across an ellipsethe biggest diameterand it cuts through the two foci.
Call Us: USA +1 862 207 3288