No, there are no known planets in our universe that do not rotate. Rotation is a fundamental characteristic of planets and other celestial bodies. The rotation of a planet refers to its spinning motion around its own axis, which is an imaginary line passing through its center. This rotational motion causes day and night cycles on a planet.
Rotation is a result of the conservation of angular momentum, which means that any initial rotation of a forming planet is generally maintained unless acted upon by external forces. All the planets in our solar system, including Earth, rotate to varying degrees. For example, Earth completes one full rotation on its axis approximately every 24 hours, resulting in a 24-hour day-night cycle.
It's worth noting that some celestial bodies, such as Venus, have a very slow or retrograde rotation, meaning they rotate in the opposite direction compared to most other planets. Venus, for instance, has an extremely slow rotation period of about 243 Earth days. However, even in such cases, the celestial bodies still exhibit rotational motion.