Yes, there are other planets beyond the eight known planets in our solar system. These are known as "exoplanets." Exoplanets are planets that orbit stars other than the Sun. Over the past few decades, astronomers have discovered a large number of exoplanets using various detection methods. As of January 2023, there are thousands of confirmed exoplanets in our galaxy, the Milky Way, with more being discovered regularly.

The existence of exoplanets suggests that planetary systems like our own are common in the universe. Some exoplanets have been found to be Earth-like in size and composition, raising the possibility of them supporting life. Astronomers continue to search for and study exoplanets, both within and outside our solar system, to better understand the formation and evolution of planetary systems and to explore the diverse possibilities for life in the universe.