Spaceflight Simulator Wiki

Earth is the third planet from the Sun. It is currently the second most massive planet in the game, behind Jupiter. It is one of five planets with an atmosphere, the others being Mars, Venus, Europa and Jupiter. Earth has one natural satellite, the Moon. This makes Earth one of the three bodies with natural satellites, the other 2 being Mars and Jupiter. It has a large Sphere of Influence (Hill Sphere), which makes entering Earth's gravity fields easy. It has a large gravity, making orbital insertion from other places easy, but circularization burns are as not as hard as conducting in Jupiter or the Galilean moons.

After building a rocket in the Build Editor, they can only be launched from Earth. They are sent to the launch pad to begin a mission. Meanwhile, all other rockets in the launch pad hit box are removed, to provide space for the rocket launch.


Atmosphere of Earth

Earth's atmosphere is thick. It has a blue hue. Earth's atmosphere can be used for aerobraking and aerocapture, for those who have returned to Earth.

Earth's atmosphere is not enough to cause significant problems such as slowing down of rockets due to atmospheric friction.

Setting a trajectory below 8 kilometers can cause problems on descent, such as an aerodynamic spin. If the rocket is spinning too much because of a high speed, it is near or at impossible to correct the spin. This option is recommended for those who travel on earth at fast speeds.


The terrain on earth is covered in rolling hills, like Mars, but they are low in height and a little spread apart, and unlike Venus andor Io, which have tall mountains/volcanoes that makes a hazard who lands on the edge or slopes of those structures. Landing on rough surfaces such as a steep hill would cause the rocket to tip over, and fall to the ground.

The launch pad is the only structure on Earth to have a trapezoidal shape. More details can be seen below.

Launch Pad

The Launch Pad is the place where rockets are launched on. Several activities can be implemented like building launch towers, a pointer beside the launch pad, and rovers. It has smooth edges, and the edge of this structure is tilted at 20 degrees. On top of the structure, it has a rocky surface, and is flat.

A rocket can be relaunched from Earth, if it is reusable.


  • Geostationary orbit: 2,108.2 km
  • Geosynchronous orbit: 1,789.3 km

Around the Earth

Earth is the home planet. The launch pad is located in this planet. Several things you can do are:

  • Building earth rovers
  • Testing rockets before launch
  • Building weather stations
  • Do scientific research
  • Building launch towers
  • Launching satellites into orbit
  • Communication satellite
  • Sub-orbital flight
  • Space stations
  • Building aircraft
  • Building missiles
  • Building cars and boats
  • Do anything you want if you are bored

Starting small is advised first. You could practice launching a rocket by building a basic rocket and send it into a suborbital flight. The next thing you can do are orbital flights. Then you can go to the moon, then you complex things such as interplanetary spaceflight, and of course, building space stations!

Earth can be also used for gravity assists. Getting orbit on Earth from other planets is easy, but circularization burns are also easy, especially when you come from the surface.


A section of Earth's surface


  • The Karman Line is technically the Von Kármán Line, but is not referred to as this in game.
  • In the real life the Kármán line measures 100 kilometers but in the game the Kármán line measures 30 kilometers.
  • There are 5 types of orbits on Earth. They are:
    • Low Earth Orbit
    • Medium Earth Orbit
    • Geostationary Orbit
    • Geostationary Transfer Orbit
    • High Earth Orbit.
  • Earth is the only planet to have a man made structure (the launch pad).
Sun MercuryVenusEarth (Moon) • Mars (Phobos · Deimos) • Jupiter (Io · Europa · Ganymede · Callisto)
Earth Moon
Mars PhobosDeimos
Jupiter IoEuropaGanymedeCallisto