It has many satellites , including 62 moons , and they swarm around the planet with many of them crossing the surface facing Earth constantly . Each of Jupiter 's four great satellites reaches its sunny side in January . That 's rare ; it has happened only twice in the last 100 years . Jupiter 's images are primarily for aesthetic purposes , a gift to the world .
Each of Jupiter 's four great satellites reaches its sunny side in January . That 's rare ; it has happened only twice in the last 100 years . Jupiter 's images are primarily for aesthetic purposes , a gift to the world .