Where can extraterrestrials reside?

The race to find intelligent life, or any life beyond Earth has led to a heated competition among scientists around the world during the past decades. Although there is no concrete evidence of alien life, it seems that any spaceship that is launched or is in the process of launching will label itself a mission of 'tracing. extraterrestrial life'.

Here are a few locations that have been discovered by famous astronomers around the world that have traces of alien life.

1. Meteorite

There have been about 22,000 discoveries about meteorites on Earth recorded and many organic compounds have been discovered on those meteorites.

In 1996, a group of scientists announced that they had found clear evidence of fossils on a Martian meteorite found in the Antarctic. This indicates that life may have existed on the Red planet about 3.6 billion years ago. After years of vigorous debate, the story of whether Mars meteorite exists or not remains unanswered.

If this is true, it will lead to a great evidence supporting the Panspermia theory, literally 'life everywhere' , which means life comes from the universe and the planets give exchanging life for each other - 'life' here means bacteria, they are potentially and resistant to harsh environments. Life can exist on another planet, maybe even on a planet close to Mars and then they will find ways to return to Earth to develop.

2. Fire

The next territory, Mars, has long been a target for those who hunt for extraterrestrial life, but the barren and ruinous landscape here redirects these hunters' attention from finding Find tiny blue aliens to find more simple forms of life.

There is evidence, however, that the Red Planet once had a warmer and warmer past with water-drained river bottoms, ice peaks, volcanoes and forming minerals in the presence of country.

In 2008, the Phoenix Explorer sent pictures of icebergs when taking a sample of soil on it, which was a great discovery in finding the water element here - an important element for the living. Another key ingredient for life was found a year later: NASA scientists discovered methane in the atmosphere of Mars, indicating that the planet still has life.

Although it is claimed that there is no life on Mars, scientists believe that it still contains bacteria that produce methane and are the first manifestation of life on Earth, because so if these types of life are similar to those on Mars, they must be smoldering right below the surface of the planet.

3. Planet Europa

Europa is the sixth satellite, orbiting from inside to outside, Jupiter, discovered by Galileo Galilei and Simon Marius in 1610. Europa has a diameter of 3,100 km, smaller than the Moon (our Earth's satellite). ) a little. The structure of Europa is mainly silicate rock and can have iron core. Europa's youthful and smooth surface makes scientists believe that beneath the outermost ice is a thick layer of water.

Because wherever there is water on Earth, life is capable of appearing and reproducing, so for many years, scientists have speculated that Europa can survive alien life. Recent studies show that the sea of ​​Europa is full of oxygen, which can support the lives of millions of tons of aquatic organisms such as those that still exist on Earth. Besides, the thermal energy produced by friction between the material layers of Europa under Jupiter's effect, enough to keep this ocean warm and help maintain life.

To see if any species exists and grows on Europa, scientists have proposed the mission to dig through the crust of this satellite, through methods such as using heat to melt ice, use Use the drill to break rocks and control ocean exploration robots deep down.

4. Callisto planet

Callisto is the outermost satellites among 4 large satellites (called Galileo satellites) of Jupiter. Callisto is made up of half ice and half water ice, possibly with some volatile tapes such as ammonia. Like Europa, Callisto is said to be able to survive life beyond Earth. There may be microbial life forms that exist in the ocean beneath Callisto's surface.

However, the viability of life on Callisto is not as much as Europa. The underlying reason is that this oceanic layer may not have the solid materials needed for life and lack of heat exchange from the Callisto core zone.

Since 2003, NASA has come up with the idea of ​​a base on Callisto with a factory that can produce fuel for further journeys into space. The construction of a base in Callisto also helps people have a chance. Department to continue exploring the satellite Europa, as well as being able to take advantage of gravity from Jupiter to speed up the spacecraft further away from the solar system.

5. Titanium glass

Titan or Saturn VI is Saturn's largest satellite, the only satellite known to have a dense atmosphere, and the only satellite out of Earth with clear evidence of the presence of stable water has been discovered. .

Titanium is composed mainly of ice and water materials. The dense atmospheric density makes it difficult to understand Titan's surface until new information is collected with Cassini – Huygens missions in 2004, including the detection of liquid hydrocarbon lakes at the polar regions of this satellite. They are the only large, stable liquid objects that exist on the surface of any known object outside of Earth. Geologically, this satellite surface is still young; Although mountains and ice volcanoes (volcanic eruptions, but mainly ice components) may have been discovered, the surface is quite flat with only a few craters.

The similarity between Titan and Earth has led scientists to question whether there is life similar to Earth on this planet.