The orbits of the moons would need to be close to each other and Neptune to take advantage of the increased heat from tidal forces. Between annihilating pretty much everything, terraforming mars, creating super novas, black holes and making a tennis ball orbit a moon you are always left with awe over the sheer vastness of space. This layer is between 10 and 15 Earths in mass, the bulk of which could be used to create multiple moons around Neptune, each one more massive than Earth and with oceans that could support life. As the atmospheric layers are slowly removed, (and potentially used for fusion with any excess hydrogen and helium added to Saturn or Jupiter), Neptune's mantle of methane, ammonia and water would be collected and stored. Terraformed Neptune (far right) with Titan as a moon to restart the dynamo.Īnd that would only be the first step. The Neptunian core is slightly larger than Earth, so it would have enough gravity to hold onto an atmosphere.

Since Neptune's magnetic field would be weakened once the water-ammonia layer is gone, some extra protection may be needed (like an ozone layer). A heat source would need to be added to sustain habitable temperatures. Once the core is left, it would be given a new atmosphere using the oxygen from the water collected, nitrogen from the ammonia, and carbon dioxide using carbon from methane. Terraforming Neptune would be extremely difficult, requiring most of the atmosphere to be removed. Underneath this is a rocky core with a mass of 1.2 Earth masses. Neptune has a rich abundance of hydrogen and helium in its atmosphere.

This would make it difficult to terraform, but not impossible. How a terraformed Neptune could look like, made in Universe Sandbox 2 by Jeansowaty.

Universe sandbox 2 terraforming mars