What is the shape of a planet's orbit? a irregular b parabolic C circular d elliptical

## Step 1<br />The shape of a planet's orbit is determined by Kepler's laws of planetary motion. Kepler's first law states that the orbit of every planet is an ellipse with the Sun at one of the two foci.<br /><br />## Step 2<br />An ellipse is an elongated circle, which means it is not perfectly circular but it is not irregular or parabolic either.<br /><br />## Step 3<br />Therefore, the shape of a planet's orbit is not irregular, parabolic, or circular, but it is elliptical.