Aliens
Alien’s topic has caused controversies world wide. Whether they are real or fake is a large question which we are not able to answer. But if they are real then on what locations could we find them,
There are various location in solar system also which could hold an alien life. And if they are real how powerful can they be. We have done a detail study about it and we are going to tell all this in today’s post so let’s begin.
What are alien's ?
Aliens could be a living organism which could be the size of a cell or bigger than a blue whale. They could be found on different locations like planets and moons and even on asteroids . But till now we have not found a single life form on other planets. But still many organisations like Nasa are searching for aliens.
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| Alien, Image source : Wion |
Till date we have no idea what aliens are. And where are they? They could be anywhere because the universe is too big and they could be even on earth living with us but just changed their body.
Since 1950 astronomers have told that planets between Habitable zone of star are more likely place for existence of life and Earth also lies in habitable zone of sun. And there are around 40 billion Earth sized planets orbiting around stars in the habitable zone inside the observable universe which means that there is a possibility of 40 billion species of aliens.
Habitable zone
The habitable zone is the area Around the star where the temperature is neither too hot nor too cold for liquid water to exist on a planet. The distance between earth and sun is perfect for liquid water to exist on earth.
And that distance is known as the habitable zone of stars. There are around 40 billion planets located in the star's habitable zone and they all can support life.
Where can aliens be found ?
Aliens could be present anywhere but a species like us can be found in certain places only. And we have found all these places where species like us or a little different from us can be found.
Mars life
Till date we have not found any proof of life on mars but life could exist there in the past as before 3 billion years in noachian period oceans existed on mars but most of the oceans dried up as water vapour escaped the atmosphere and reached space.
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| Mars, Image source : Nasa |
But when water existed on mars there could be microorganisms or even intelligent life present on mars, as scientists believe that mars also existed in the habitable zone of the sun before millions of years ago.
Europa life
Europa is a natural satellite of Jupiter. Which orbit's Jupiter and it has a solid water ice and silicate rock surface. But under the surface of europa liquid water is present. And scientists have said that after earth, europa is the most likely place for life to exist in the solar system.
The liquid water under the surface could have life similar to the life found in Earth's deep ocean. The depth of the European ocean is around 100 to 200 km deep.
And the water present in this gigantic ocean is also rich in sodium chloride (salt) like earth. Water on Europa has a volume of 3 billion km³ which is bigger than the water present on earth.
Trappist 1E
After the solar system we would now move to outer space to look for habitable places. Trappist 1E is an exoplanet which orbits its star Trappist 1 the star is a brown star and a low mass star.
The planet lies in the habitable zone of the star. The planet is 39 light year (369 trillion km) away from earth. The planet has a safe distance from the star which makes it habitable for life.
The planet could have liquid water and could also have oxygen due to water. The planet has very high chances of life. It takes 6.1 day to complete a rotation around the star and has a mass of 0.692 earths.
Kepler 22B
Kepler 22B is an exoplanet which orbits its star Kepler 22 the star is a G5V star and a yellow star the star is smaller and colder than the sun. The planet lies in the habitable zone of Kepler 22B. The star is 600 light year away from earth.
The exoplanet is 2.4 times larger than earth and takes 290 days to complete one rotation around the star like earth takes 360. The planet could also have liquid water on its surface and may also have life.
How powerful could aliens be?
Extraterrestrial life, the life that exists on another planet could be stronger or weaker than us. To measure how advanced civilization is, a Kardashev scale is made.
The Kardashev scale is used to measure how much Technical Advancement civilization has made on the basis of how much amount of energy it is able to use. The scale was made by Nikolai Kardashev in 1964. There are three main types of Civilization.
Civilization I - the civilization I can use all of the energy available on its planet this civilization is also called planetary civilization. We humans come in type 0 civilization and will get promoted to civilization I within 100 to 200 years time. And after that we would be able to control all the energy of the planet.
Civilization II - The Civilization II can use and control the energy of a complete star and its planetary system. This type of Civilization is also called Stellar civilization. aliens of this civilization would have conquered all the planets and used the complete power of the host star.
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| Dyson sphere, Image source : Forbes |
Civilization III - civilization III can control the energy on a large scale like the entire Galaxy. This civilization is one of the most advanced civilizations also called the galactic civilization. Aliens of this civilization would be much stronger and advanced then we imagine they would have used each planetary system's energy and have found a way to extract energy from black holes too and they will be able to travel between planetary systems very easily at very high speed.
Conclusion
So this was all for today, Hope that you would have learned something new about alien’s today. The important points of today's post were -
- Aliens are hypothetical life that exist outside the earth on various planets or on any exoplanets.
- A planet beyond the solar system orbiting another star is known as an exoplanet.
- The habitable zone is the area Around the star where the temperature is neither too hot nor too cold for liquid water to exist on a planet.
- Before 3 billion years in the noachian period oceans existed on mars.
- Europa is the most likely place for life to exist in the solar system.
- Trappist 1E is habitable for life; the planet could have liquid water and could also have oxygen due to water.
- Kepler 22B is 2.4 times larger than an earth planet and could also have liquid water on its surface and may also have life.
- The Kardashev scale is used to measure how much Technical Advancement civilization has made on the basis of how much amount of energy it is able to use.
- The civilization I can use all of the energy available on its planet is also called planetary civilization.
- Civilization II can use and control the energy of a complete star and its planetary system.
- civilization III can control the energy on a large scale like the entire Galaxy.
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