Have you ever thought about where we should go if one day our earth is going to be destroyed?
In response to this problem, scientists have proposed that from a long-term development perspective, colonizing the universe is the only guarantee for human survival.
The earth may not be destroyed at any time or no longer suitable for human survival. If there is a prepared site, it is very important for human reproduction.
But which planet should we move to? If you had to choose, which planet would you most like to visit?
Next, let’s list the planets that humans are most likely to colonize and see if there is one you like.
ranked first, Mars
Among all the possible planets to colonize, Mars is the closest to the earth. Research shows that Mars once had an atmosphere and ocean, but due to unknown reasons, the atmosphere and ocean disappeared.
This desolate earth has always been looked down upon. Just like the Gobi Desert, how can humans survive here? But from a cosmic perspective, Mars is a more suitable planet.
First of all, Mars is relatively close to the earth and can be reached using current scientific and technological means, and the gravity and temperature of Mars are also acceptable to humans.
The most important thing is that a day on Mars is very close to a day on Earth, with only a 37-minute difference. We can still have the same schedule as on Earth on Mars.
But for now, the disadvantage of Mars moon is that it has no atmosphere. Without the atmosphere, the radiation in the universe would reach Mars directly, and humans would simply not be able to survive in this environment. Therefore, the only way to build a protective cover is to build a dome protective cover in the residential area of Mars, just like in science fiction movies.
This is something that can be easily achieved. Building a protective shield on Mars is no different from building a deep-sea detector on Earth, because people believe that the Mariana Trench on Earth is much more dangerous than on Mars.
Another issue that restricts migration is temperature.
Before we said that humans can accept the temperature of Mars, that refers to the temperature of the Martian equator. On the equator of Mars, even at the hottest time, the temperature is only about 20 degrees, which can be said to be very suitable for human habitation.
However, Mars only allows humans to live in its low latitudes. In the mid-latitudes, the temperature drops to about minus 50 degrees. No one can bear this temperature, let alone high latitudes, where the temperature will be even lower.
is second, Titan
In the solar system, besides Mars, Titan is the second choice.
But Titan is much smaller than Mars, so gravity is a limiting factor. Based on the current number of humans, Titan will definitely not be able to accommodate these people.
Secondly, temperature is also a constraint.
The average temperature on Titan is as low as minus 180 degrees, and humans cannot survive at minus 50 degrees on Mars, let alone minus 180 degrees.
In addition to gravity and temperature, another big problem on Titan is lighting.
Titan is the sixth satellite of Saturn. Saturn is already very far away from the sun, let alone Titan. Therefore, there is a serious lack of light on Titan, and very little sunlight reaches Titan. Even if it arrives, it will be blocked by Titan's thick atmosphere and cannot reach the surface at all.
With such a harsh environment, why is Titan still classified as an alternative planet by humans?
This is because Titan contains large amounts of organic hydrocarbons. Like water on Earth, hydrocarbons are common on Titan.
Compared with Mars, Titan has its own energy source. Humans can use this large amount of hydrocarbons to build power stations, and then build a protective shield like the one on Mars. In this way, the temperature can also be adjusted and the light becomes sufficient.
third place, Proxima Centauri
The immigrant planets in the solar system have been introduced, now we turn our attention to the outside of the solar system.
Proxima Centauri b is a very suitable planet for colonization outside the solar system. This planet is very similar to the Earth in all aspects. But Proxima Centauri has a very bad temper, and it has repeatedly emitted super radiation to other planets. Maybe moving to Proxima Centauri isn't such a good thing.
In addition to Proxima Centauri b, several Earth-like planets that are relatively close to the solar system cannot be used as planets for migration. For example, the Ross 128 galaxy is a planet orbiting the red dwarf star .
A red dwarf star is a dim and low-mass star. Generally, the planets of this star are relatively close to it and are subject to a large amount of radiation, so they are not suitable for human habitation.
Fourth place, the planet of the Kepler 62 system
Almost all of the Earth-like planets discovered by the Kepler telescope are more suitable for human habitation. Almost all of their stars are yellow or orange stars like the sun.
The star Kepler 62 is a K-type star with a spectral type. It is smaller and older than the sun, but it seems to be "good-tempered" than the sun. Around this star, scientists have discovered 5 planets. The most popular ones are Kepler 62e and Kepler 62f.
Kepler 62e is 1.5 times larger than the Earth, and its mass is 2.5 times that of the Earth. The entire planet is covered by oceans, and many of them may have life. Not only that, the average surface temperature of Kepler 62e is about 17 degrees, which is very suitable for life.
However, it is not certain whether there is an atmosphere on this planet. If there is an atmosphere, then a suspended city can be built on this planet.
Compared with Kepler 62e, Kepler 62f is slightly farther from the main star. This planet is not covered by oceans, but by ice, which means that the temperature of this planet is very low. But it’s not as low as the Earth’s Antarctic, so the conditions are relatively less harsh.
If the heating problem can be solved and there is an atmosphere here, the probability of humans migrating to this planet in the future is very high.
Fifth place, Cetus f
Cetus T is considered to be the celestial body most similar to the sun, and is famous for it. In this star system , T Ceti f is the most likely to be suitable for human habitation.
The mass of T Cetus f is 4 times that of the Earth, and its size is 2-3 times that of the Earth. It is called a "super Earth". The location and conditions of T Ceti f should be suitable, but we don't know it clearly yet. We know nothing about the planet's mass, size, or density.
If the planet's gravity is too strong, then humans are likely to feel that their bodies are too heavy. If the temperature of this planet is too low, it will be like the Antarctic continent of the earth, and people will have to stay at home and not go out to survive.
The most important thing is that T Ceti f is a place frequently visited by an asteroid or meteorite , so if you want to establish a settlement area here, you will be attacked by meteorites from time to time, and your home may also be smashed.
sixth place, Kepler 1638b
If the disaster in the universe is very serious, then there is a high probability that the solar system will not be able to live, and it will have to run a little further away. The Kepler 1683 galaxy is a good choice.
This galaxy is about 5,000 light years away from the earth, and there is a super Earth named "Kepler 1683b". Of all the habitable planets discovered so far, this one is the farthest from Earth.
The mass of this planet is 4 times that of the Earth, and its size is about 2 times that of the Earth. However, this data is only an estimate and not accurate.
If Kepler 1638b is really suitable for life, then we can directly try to migrate here without considering other planets.
At present, observation technology is still very immature. We mainly observe large extrasolar planets such as gas giant planets, ice giant planets and super Earths. Maybe, more more habitable planets will be discovered in the future.
Author: Xiao Abe Proofreading: Chuanchuan
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