The extraterrestrial life object

I think that human beings have talked about the extraterrestrial life object taken up in topic since human beings were born and it began to have intelligence. First of all, what is an extraterrestrial life object? The answer is

it is a life which lives out of an earth's atmosphere. The way of speaking which we say well is an "alien." But the extraterrestrial life object doesn’t need to be a "person." Any lives will do.

The present human beings have big concern in the extraterrestrial life object. I want you to remember that there are the large numbers of movies dealing with it and news of such as extraterrestrial life object discovery all over the world. Then, probably, you can be convinced. If it is the movies, for example, there are “E.T.”, "predator" and so on. VTRs which photographed the image of UFO are often contributed to television in foreign countries.

Does an extraterrestrial life object actually exist?

First of all, I will talk about the possibility in the solar system.

It has been surmised in the past whether the life existed in other planets in the solar system from atmospheric composition, temperature, etc. However, we thought that any intelligent lives except an earthman cannot exist in the solar system as detailed observation progressed. But the conclusion is not reached about whether the primitive life occurred except the earth. Especially about Mars, because it was thought that it had water of a liquid and atmosphere once, the life may have occurred.

Mars explorer Viking 1 and 2 which NASA sent in the 1970s extracted the sample of Mars topsoil, and did the examination which checks whether the signs of a life activity are seen there. However, the result didn’t affirm existence of a life. Although Beagle 2 which Britain sent to Mars in 2003 was a lander aiming at the first search for life since a Viking, communication stopped after the atmosphere entry and this ended in failure.

Except Mars, Europa and Ganymede which are the satellites of Jupiter and Enceladus which is the satellite of Saturn, etc. attract attention. Although these heavenly bodies are mainly made of ice and rock, it is thought that the layer of the water of a liquid will exist underground. bacteria may be underwater. Moreover, Satellite Titan of Saturn is also mentioned to the candidate of the heavenly body in which a life exists because it has the thick atmosphere and hydrocarbon of a liquid exists in the surface.

The next is outside the solar system. I want you to know that the domain which is suitable environment for birth of life in the universe called a habitable zone exists in the universe. That is, in the planet which exists in this habitable zone, life objects may exist. Many planets are actually found in the habitable zone. For example, they are Gliese 581g, Gliese 581c, etc.

Finally I will express my opinion. I think that an extraterrestrial life object exists. I don’t think that an alien which surely comes out on a movie exists. But if it is bacteria, a microbe, etc., I think that existence is not amusing because the universe is very very grand and we don’t know most of the universe. The earth is below the point of the universe. It is next to impossible that earthman who lives on such the earth investigates whether an extraterrestrial life object exists in the universe. Supposing it is found, the life object will exist very near the earth. I think that an extraterrestrial life object exists in somewhere in universes, and want to exist.