Yes, the orbits of most planets in our solar system have eccentricities close to zero. This means their orbits are nearly circular.

Here's why:

* Eccentricity is a measure of how much an orbit deviates from a perfect circle. An eccentricity of 0 represents a perfect circle, while an eccentricity of 1 represents a parabola.

* Planets in our solar system formed from a disk of gas and dust. The gravitational pull of the Sun caused this material to flatten into a disk, and planets formed within this disk. The circular nature of the disk resulted in planets having nearly circular orbits.

However, there are exceptions:

* Mercury has a relatively high eccentricity of 0.206, meaning its orbit is significantly elliptical.

* Mars has a moderate eccentricity of 0.093, giving it a more elliptical orbit compared to Earth.

While these planets have more elliptical orbits, they are still much closer to circular than to a parabolic shape.