Spaceflight Simulator Wiki

Mercury is the closest planet to the Sun. It is currently the closest planet to Earth and it is a mottled gray airless, moonless world. It has the 2nd highest Delta-v requirement for a mission after Europa. Mercury has no moons.

Mercury's surface is very rocky, and has a lot of craters like the Moon.

Mercury is also the hardest planets to reach on, due to the proximity to the sun and low gravity. In real life, 3 spacecraft went to Mercury, Mariner 10 and MESSENGER. BepiColombo is also the spacecraft that is now currently visiting Mercury.

Around Mercury

Due to the difficulty of orbiting and landing on around Mercury, (and returning back to Earth), successful missions are seen as great achievement all over the SFS community.

The delta-v it takes can be reduced by multiple Gravity Assists off of Venus and Mercury itself, as well as sitting at low heliocentric orbit between Venus and Mercury, and using Venus to go to Mercury, and many more.

If you feel you have gotten the hang of getting to Mercury, you can try building a Space Station or fuel depot to aid future missions.

Mercury’s Surface

Mercurian surface

Like the Moon or Callisto, Mercury has many craters. Unlike those two, however, Mercury’s craters are shallower and more spread apart.

Landing on Mercury can be difficult not because of the gravity or terrain, but because of the lack of an atmosphere to use parachutes to slow down a rocket. A landing on Mercury would require plenty of fuel and retrorockets to slow down.

If a player wants to get back to Earth, the amount of fuel would become much higher, due to the fact you need to use the planet Venus to get back to Earth easily. Learn more


Not all Mercury missions succeed.

Special Orbits

  • Hermesynchronous: 9,107 km.
  • Semi-synchronous: 4,553.5 km


  • On the Spaceflight Simulator Forums, Mercury is often referred to as “The Graveyard” due to how difficult it is to orbit and land on.
  • In 1.4, Stef Moroyna (Main game developer) forgot to include Mercury’s texture, so it was completely white (kind of like a cheese ball) until it was re-added in 1.5.
  • Mercury in real life has a thin atmosphere (or exosphere), composed of oxygen, hydrogen, helium, sodium and potassium.
  • Mercury's orbit is circular in game, unlike in real life, it is oval shaped.
  • Mercury is also the closest planet of all planets in the solar system.
Sun MercuryVenusEarth (Moon) • Mars (Phobos · Deimos) • Jupiter (Io · Europa · Ganymede · Callisto)
Earth Moon
Mars PhobosDeimos
Jupiter IoEuropaGanymedeCallisto