Uranüs is the seventh planet from the Sun in our solar system and is known for its striking blue color, which is due to the presence of methane in its atmosphere. It is classified as an ice giant, having a thick atmosphere composed mainly of hydrogen and helium, along with water, ammonia, and methane ices. Uranüs has a unique tilt, rotating on its side, which results in extreme seasonal variations. The planet has 27 known moons, with the largest being Titania, Oberon, Umbriel, Ariel, and Miranda. Uranüs also has a faint ring system, composed of dark particles. It was discovered in 1781 by William Herschel, making it the first planet found with a telescope.