Among the following options, which one is NOT a satellite?

To identify which option is not a satellite, it's essential to understand the definitions of various astronomical terms. A satellite is an object that orbits around a planet or another celestial body.

The Moon is Earth’s natural satellite, and both Jupiter and Saturn are planets that possess many natural satellites (like Jupiter’s moon Europa and Saturn’s moon Titan). Probes, on the other hand, refer to human-made objects that are sent into space for exploration or data collection but do not orbit a celestial body as satellites do.

Therefore, Jupiter, while being a massive planet with its own moons, does not fit the definition of a satellite; it is indeed a planet itself and stands as a primary celestial body in the solar system. Thus, the answer identifies a planetary body rather than a satellite.