What is the largest satellite (in the true definition of the term) in our solar system?

Jupiter's moon Ganymede is the largest moon in our solar system, bigger than the planet Mercury and dwarf planet Pluto.

A satellite is a body that orbits around another body in space. There are two different types of satellites - natural and man-made. Examples of natural satellites are the Earth and Moon. The Earth rotates around the Sun and the Moon rotates around the Earth. A man-made satellite is a machine that is launched into space and orbits around a body in space. Examples of man-made satellites include the Hubble Space Telescope and the International Space Station.

Jupiter is the largest planet in our solar system. If Jupiter was a hollow shell, 1,000 Earths could fit inside. Jupiter also is the oldest planet, forming from the dust and gases left over from the Sun's formation 4.5 billion years ago. But it has the shortest day in the solar system, taking only 10.5 hours to spin around once on its axis.