Jupiter is the largest planet in the solar system and has more than double the mass of the other planets in the solar system combined. Being the largest and most massive planet in the solar system isn't Jupiter's only distinction, though, as the gas giant is distinguished in several unique ways.
Jupiter lacks a solid surface. Instead, the planet has a large atmosphere that becomes steadily more dense along a smooth gradient until, at depth, the pressure is so great that ordinary matter takes on unusual forms. Jupiter's deep atmosphere consists of an ocean of liquid, metallic hydrogen, a substance so exotic it has never been reproduced on Earth. As this thick, soupy hydrogen sloshes around, it generates an immense magnetic field. Jupiter's magnetosphere is so large that, if it could be seen, it would appear larger than a full moon from Earth's surface. This enormous field reaches nearly to the orbit of Saturn and is the largest continuous structure in the solar system. Despite this, its existence was only detected in the 1950s when astronomers began receiving faint radio signals from the charged particles trapped in the magnetic lines of force. Jupiter is the only planet known to radiate in the radio spectrum. The large magnetic field, and the banded cloud formations in Jupiter's atmosphere, are the result of the planet's extremely fast rotation. Jupiter spins faster than any other planet and completes a rotation on its axis in about 10 hours. Despite this Jupiter takes 12 years to complete one orbit around the sun.