Yes, there is a planet named Neptune in our solar system. Neptune is the eighth and farthest known planet from the Sun. It is a gas giant, similar in composition to Uranus, and it is the fourth largest planet by diameter.
Neptune is located approximately 30 astronomical units (AU) away from the Sun, where 1 AU is the average distance between the Earth and the Sun. It has a diameter of about 49,000 kilometers (30,500 miles) and is about 17 times more massive than Earth.
Neptune is known for its beautiful deep blue color, which is caused by methane gas in its atmosphere that absorbs red light and reflects blue light. The planet has a turbulent and dynamic atmosphere with prominent features like large storms, including the famous Great Dark Spot, which was similar to Jupiter's Great Red Spot but has since disappeared.
Neptune has a system of rings, though they are fainter and less prominent compared to the rings of Saturn. The planet also has a number of moons, with the largest and most well-known being Triton, which is notable for its retrograde orbit around Neptune.
Neptune was discovered in 1846 through mathematical predictions based on perturbations observed in the orbit of Uranus. It was the first planet to be located through calculations rather than direct observation. Since its discovery, several missions, including Voyager 2 in 1989, have provided valuable data and insights about Neptune and its moons.