In the future we will all be aliens! It is a certainty, the Earth having to disappear one day or another. Our days on this planet are therefore numbered. But fortunately, there are many planets outside our solar system that are similar to ours. For this, they must meet three main criteria.
First of all, for a planet to be considered habitable, it is necessary to
- that his star is neither too hot nor too cold, like our Sun in short. In this respect, a temperature between 4,000 and 7,000 ° C is essential.
- that it is in the habitable zone. This is actually an orbital region where the water remains in the liquid state.
- it is dense and not gaseous. It must therefore be essentially rocky.
Since then, the Arecibo Observatory of the University of Puerto Rico in Arecibo has drawn up a list of these planets based on their similarity to the Earth, taking the size, mass and distance of their host star into considération.
It is a confirmed exoplanet of Super-Earth type. It is located 2,700 light-years from the solar system and was discovered by astronomers affiliated with the Kepler Mission. Its existence was confirmed on April 18th. This exoplanet is 70% larger than the Earth and it is in the habitable zone. It turns into orbit every 242 days around its star, which strongly resembles our Sun. However, at present, the discovery is too recent to gather enough information about a possible life on the spot. But according to the scientists, Kepler-69C is a “perfect candidate for hosting extraTerrestrial life”.
Discovered on April 23, 2007, this exoplanet belongs to the planetary system of star Gliese 581. It is located some 20.3 light-years away from Earth, in the constellation of Libra. According to a team from the Laboratory of Dynamic Meteorology of the Pierre-Simon Laplace Institute in Paris, there could be life on this planet, which is in the habitable zone, and the possible presence of an ocean confirm this possibility. According to these researchers, “if Gliese 581d were indeed habitable, it would be a very strange place to visit: its dense atmosphere and thick cloud layer would plunge the surface into a reddish twilight and gravity would be twice that of the Earth”.
According to Wikipedia, this is an extrasolar planet of the Super-Earth type orbiting in the habitable zone of the star HD 40307. It is located 42 light-years from the Earth in the southern constellation of the Painter and has been discovered October 28, 2012. Although the planet represents at least seven times the mass of the Earth, scientists think that it could have a climate similar to that of the Earth because it orbits its parent star at a distance that is similar at the distance between the Earth and the Sun. According to Hugh Jones of the University of Hertfordshire, England, “the longer orbit of the new planet means that its climate and atmosphere could be appropriate to support life”. Gravity, on the other hand, is more important: 1.9 times that which we know on Earth.
According to Business Insider, this potentially habitable exoplanet was discovered in September 2012 by an international team of astronomers, using the telescope of the European Southern Observatory in Chile. It is about 50 light-years away from Earth. It would be a super-Earth gravitating in the habitable zone around its star Gliese 163, a red dwarf located in the constellation of Dorado. Its mass is almost seven times that of the Earth. On the other hand, it only takes 26 days to orbit the star.
According to Futura Sciences, “if its atmosphere is similar to that of Earth, its average temperature would be about 60 ° C. It is too much for complex organisms similar to those known on our planet but it remains acceptable for some extremophiles microbials living on Earth”.
According to Wikipedia, it is a super-Earth-like exoplanet, orbiting the Kepler-62 star located 1,200 light-years away from Earth. It is the planet furthest away from its star among the five planets of this system discovered on April 18, 2013 by the Kepler space telescope. This planet has a radius 1.41 times greater than that of the Earth. This makes it the planet the most similar to the Earth in size to be in a habitable zone. In addition, a modeling study developed in the Astrophysical Journal indicates that it is likely that the planet is entirely covered by an ocean.
Distance from the Sun
|Planet||Distance (millions of km)|
I LOVE THE EARTH
- Rich environnement
- Different climates
- The people
First steps towards the stars.
To launch our race towards the stars, it would be necessary to develop the essential sciences to the realization of the project: ecology, sociology, neurobiology, human, animal and vegetal biology, quantum physics, physics of the materials, etc .; develop the necessary techniques: ecosystem, symmetry, nuclear fusion, vacuum production techniques and microgravity: mining extraction, metallurgy, ceramics, assembly, synthesis of macropolymers, aerogels and vacuogels, etc .; and to create now the roots of the “long-range society” that we need to realize our project, a society which will have to replace the capitalist point of view (oriented towards the immediate maximization of personal profit) by the ecosystem point of view (oriented towards the long-term optimization of the cost / benefit ratio for the people involved as well as for society and the environment) before the neoliberalism currently in fashion takes us back to the horrors of the beginning of the industrial era.
We are just an advanced race of monkeys on a small planet of an ordinary star. But we can understand the universe. That makes us something very special. STEPHEN HAWKING