What is the youngest planet in our solar system?

The youngest planet in our solar system is believed to be Earth. It is thought to have formed about 4.5 billion years ago, making it relatively young compared to other planets in our solar system. Earth's formation was a result of gravitational forces and the merging of smaller particles in the solar nebula. Over time, the planet has undergone significant changes, including the development of its atmosphere, oceans, and the emergence of life. Today, Earth is the only known planet in the solar system that supports life.