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Planets Expansion Required
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Ganymede is the largest and third most distant of Jupiter’s Galilean moons. It is larger than Mars and is grey-brown in color with white streaks. It is included in the Planets Expansion DLC.

Ganymede is slightly more than half of Earth’s radius and it has the largest gravity of all Galilean moons at 5.81 m/s2

Around Ganymede

Ganymede’s high gravity makes it a prime target for Gravity Assists. Very low passes can be made, due to the uneven terrain not stretching much higher than 200 meters.


As seen in the picture to the left, a ganymedecounter can be used to capture at Jupiter very easily, and in this case, set your rocket on a trajectory to go to another moon.

Like Io, however, orbital insertion can be quite expensive.

Ganymede’s Surface

Ganymede’s surface is perhaps the most interesting out of all of Spaceflight Simulator’s planets and moons (like Venus). Most of the surface is mildly hilly, but every few hundred meters there are a scattering of uneven mountain peaks and plateaus. If the landing footprint is in rough terrain, you may land on a spot that will cause your rocket to tip.

A section of Ganymede’s terrain.

However, the rough regions double as prime roving locations for moderately sized rovers.


A early sneak peek of Jupiter’s moons. Europa and Ganymede are visible.


  • Ganymede is so large; it would be considered a planet if it wasn’t orbiting Jupiter.
  • Ganymede has a magnetic field and even faint auroras.
  • Like the rest of the Galilean moons, Ganymede was a lover of Zeus, who abducted him to become a cup-bearer for the Olympians.
  • Ganymede formed in Jupiter’s nebula in about 10,000 years.
  • The high radiation on Ganymede would kill a person in 2 months.
  • In Spaceflight Simulator, Ganymede is bigger than Mars.
  • Ganymede is the largest of all moons in-game and in real life, larger than Mercury.
  • Ganymede has an atmosphere that is mainly composed of oxygen.

Sun MercuryVenusEarth (Moon) • Mars (Phobos · Deimos) • Jupiter (Io · Europa · Ganymede · Callisto)
Earth Moon
Mars PhobosDeimos
Jupiter IoEuropaGanymedeCallisto