Neptun is the eighth and farthest planet from the Sun in our solar system. It is classified as a gas giant and is known for its striking blue color, which is due to the presence of methane in its atmosphere. Neptun has a diameter of about 49,244 kilometers, making it the fourth largest planet in terms of size. The planet has a strong magnetic field and experiences extreme weather, including the fastest winds recorded in the solar system. Neptun has 14 known moons, with the largest being Triton, which is unique for its retrograde orbit, indicating it may have been captured by the planet's gravity.