The reason, why we are afraid alien contact

The reason, why we are afraid alien contact

1) Alien would be an outsider, the creature that will not have a dependency on planet Earth. So if the hypothetical alien would want to destroy Earth, it could be made that without self-destruction. 

If the creature would be not tied to the system, that creature can destroy the entire system without the need for self-destroying. So if we are connecting that thing to the SETI-program and aliens, the species, what is living on some other planet would not need planet Earth. And that thing makes possible that this creature would destroy our planet without annihilating itself. So this is one of the most remarkable things, what we think about the relationship with mankind and space colonies.

1.2) If the space colony would terraform their planet, it would cut the dependency on Earth. And that would turn those colonists humanoids to Earth. 

If the space colony would turn too independent, that thing can start to rebel against Earth, and this is the reason, why we are concerning every movement in the space so carefully. And that is the thing, why we must realize, that when we are creating space colonies, our greatest opportunity can turn to the greatest nightmare, what mankind can get. 

The terraformation of some planet would release that thing from the dependency on the planet and Earth. And that thing would turn the colonialists to humanoids for Earth. There are three ways to terraform the planet, and the only one allows that mankind can walk outside of the base without protective clothes. The last two are allowing more limited possibilities to benefit the other planet.

2) Terraformation has three types

2.1) The full terraformation

In that case, the entire atmosphere of the planet would turn to the similar, what it is on the Earth. The atmosphere transformation would allow benefiting the entire planet, but the problem is that the requirements of the successful accomplishments for that project.

The planet should be in the precise right distance, that there would be liquid water. Also, gravity and other things like radiation level, a level of magnet field on the surface are important, because without gravity and magnet fields the atmosphere of that planet would fly to space.

So this kind of terraformation is the most sensitive thing and the possibility for mistakes is huge. And of course, there is a possibility that the bacteria that have been lived on the planet has been survived the operation, and that thing can cause problems with terraformation and the crew of the space station.

2.2) The "Atlantis-model" underwater base in some icy moon of Jupiter and Saturn

The second model would be suitable for the icy moons like Europe and other moons, where is liquid water under the ice layer. That thing makes possible that the astronauts can swim in the water, which will protect them against the cosmic radiation, and the radiation, what comes from the planets like Jupiter.

In that base, the persons, who are working in there can benefit the tidal energy, what is forming, when the gravity of the planet would transfer the water below the ice layer. That tidal force would keep the water under the iced core liquid. But the problem is that there can be some kind of amoebas and bacteria, which can cause diseases, but other ways the filtered and cleaned water can use normal water, and that water can use for creating oxygen by using electrolysis.

2.3) The "greenhouse model" where large areas of the planet would cover by greenhouses. 

This model where the planet would cover by using a physic layer of glass, or rather saying armored glass. The glass would keep the air inside the structure, even if the gravity- or magnet field of the planet would be weak. The physical structure would cover the colony against the radiation, and that means that the solution would be simple and traditional.

But the problem is how to get water to those planets. If the surface of the planet is covered by the minerals, there is water stored in small crystals, the separation of water is very easy. There is a possibility, that some bacteria could live in that water, and the result would be an infection, even if the bacteria would be in non-active conditions.

So if the metabolism of the bacteria has been stopped it would not be noticed. And there is a possibility that some bacteria need a very long time, that they would reactivate their metabolism, what mean, that the time would be years. The problem is that when researchers would go to another planet, they would not even know, what kind of creatures there could be.

Image: https://www.nasa.gov/sites/default/files/thumbnails/image/pia19048_1.jpg