While other orbits, like elliptical orbits, can be very close to circular, a true circular orbit is perfectly circular, meaning its shape is a perfect circle with no deviation.

Here's why:

* Circular orbits have constant speed: The orbiting object moves at the same speed throughout its entire path.

* Circular orbits have constant distance from the center: The orbiting object maintains a consistent distance from the body it's orbiting.

* Circular orbits are the most stable: They require the least amount of energy to maintain.

While perfectly circular orbits are rare in nature due to gravitational influences from other bodies, many orbits are nearly circular and can be approximated as such for practical purposes.