planet. Than any previously discovered planets are closer to the Earth's environment, human migration may be the best choice outside the solar system. Aerospace experts said that this is a human search for the "new earth" of an important milestone on the journey, but to immigrants to the "Kepler-22b" impossible.
Distance: 600 light years from Earth
Location: located in the star system "habitable zone" of the middle
Size: radius of about 2.4 times the radius of the Earth
Time: the period around the star of about 290 Earth days
Temperature: The average surface temperature is about 21 ℃
Environment: the surface of liquid water. Currently, scientists do not know, "Kepler-22b" The main ingredient in the end is on the rocks, gases or liquids
Migration time
After 1 million years
Human beings to leave the solar system
"Kepler-22b" discovery of the entire United States, NASA staff are excited. NASA spokesman Joshua Buck said, to find livable planet just the first step in the search for extraterrestrial life. If the prevalence of such planets around a star, "Kepler" will find hundreds of Earth-sized planet livable, and that means life in the galaxy may be prevalent; If, by contrast, is that the Earth is the only possible a life station.
In microblogging, many users are in the Imagination of mankind to be able to immigrants "Kepler-22b". They laugh: "Everyone has new home! Hope for the future of mankind!" "China's real estate developers pay attention!" ...
But Beijing Planetarium curator Zhu's remarks gave these users into a pot of cold water poured. "Man's current level of technology is absolutely impossible to leave the solar system, now and then it is not possible to immigration!"
Zhu Jin told reporters: "At present, the detector is the farthest human launched in the 1970s of the" Voyager 1 ", but 30 years of flying, to fly to Pluto, it is now near the flight distance is the radius of a thousand solar system one, on the current level of technology, humans leave the solar system at least 10,000 years, to immigration, communications issues, problems, and so the problem of human life are overcome, it is impossible to human migration to the "Kepler - 22b" . "
"Although the sinking planet may indeed very good, but want to do are two different things, in order to" space migration ", the human level of technology required can not imagine the high point of our present level, the human has been able to run to Mars is a very big step forward, even if Mars will not be able to come back. "
Reuters reports that the planet may always remain "sunny" good weather, is likely to have for life. This is mainly due to its rotation law makes it always a side facing the star. The AFP believes that "Kepler-22b" Although we are sure appropriate home planet, but it does not mean that there must exist life.
Existing spacecraft to the new earth to be 1160 years
Existing man-made spacecraft, is the fastest flying to Pluto when the number of the "New Horizons" spacecraft, its speed is currently about 15.5 km / sec. If the speed to fly 600 light years away, "Kepler-22b", about 1160 million years to reach. Even the star closest to the sun near Centauri star, from 4.22 we have enough light. The "New Vision" was present, then flying speed, arrived next star is at least 8 years. Therefore, in accordance with the existing level of technology mankind, like the possibility of migration of the planet is almost zero.
Livable Planet
47 planets and satellites
The second candidate to enter the Earth
6, according to British media reports, scientists have begun to create a system of "Livable Planet Guide", the so far discovered the planet for future human migration categories. It is reported that 47 human planets and satellites may be moved to meet the human condition.
University of Puerto Rico's laboratory livable planet known to man, more than 700 types and their respective planet's solar system analysis, found that the vast majority of life on the planet do not have the conditions of survival, of which only 47 stars into the "second a global "list of candidates.
This tutorial uses innovative assessment criteria, such as terrestrial index habitable zone distance, classification systems, and with the Earth in the past, present results of the comparison. The results showed that only two known planets in line with the guidelines livable level, which is code-named Grace 581d and HD 85512b the planet, the other 15 planets and 30 satellites into the candidate list.
Livable condition
Longevity with water and bodyguards
Astronomers lists a livable planet, planet or satellite need to have the three conditions.
1 liquid water: Water is the source of all life. Since life can not do without water, the search for extraterrestrial life search for the essence of liquid water.
2 life: making life process requires a very long time, so there is a galaxy have life, life is not its central star is too short. Generally accepted that the central star of life to reach at least 10 billion years, it's possible to nurture life-line galaxies.
3. "Bodyguard": galaxies with a line of giant gas planets are also important number of conditions. In our solar system, Jupiter and Saturn belong to the giant gaseous planet, they have great quality, in fact, act as Earth's "bodyguard." They like the baseball glove to resist the invasion of the comet on the Earth, or to attract possible collisions can deviate from the Earth's comet.
Immigration Dictionary
What is a habitable zone?
If we put all life on earth and their needs at different stages of evolution to be summarizes the different conditions, these conditions are extended to the necessary conditions for the planets, the sun is a star system or even the conditions of the conditions, there is a "livable space zone "concept.
According to NASA defined in the "habitable zone" of the planet, a planet with the means to maintain an appropriate distance from the parent star, and thus to provide the conditions for liquid water on its surface. Stars in heat transfer medium to the planet, the planet is neither too hot nor too cold. This distance will be based on the state of the parent star changes brightness of the star distribute heat more high, the far distance, calories less stellar distribution, the closer distance. "Habitable zone" between the planet's surface temperature is about minus 17 degrees Celsius to 93 degrees Celsius.
To the solar system, for example: solar system eight planets, only pleasant temperatures on Earth, so that long-standing water in liquid form on the surface above. The fundamental reason is the distance from Earth to the sun neither too close nor too far, solar radiation received just fine. The sun around the area to meet this condition, it was called the "habitable zone."
Discovery
How Kepler
Find a new Earth
Kepler telescope, by observing stars - cyclical changes inferred the existence of the planet, suggesting that the process takes at least four times to confirm.
The planet itself is not luminous, so direct observation very difficult. However, if the non-luminous planets through the front from the star, will block part of the star, causing the brightness of stars we see a little dark in a short time, then back to normal again. If the phenomenon of periodic dimming of stars that appear, at least 4 times observed, you can determine where there is a planet we can not see. This method is the so-called "transiting Act."
"Kepler-22b" is found in this way to the star, Kepler telescope to approximately 290-day cycle, the occurrence of starlight dimmed and restore a normal phenomenon. According to stellar brightness dimming rate, astronomers determined the planet's radius is about 2.4 times the Earth; the basis of this phenomenon occurred in cycles, astronomers calculated the orbit of the planet.
Immigration Imagination
How much house prices?
Imagine netizens recently, perhaps to discuss the future people will no longer go abroad, but out of the earth.
@ Zhu Jie Taiwan: New Earth, seeking board.
@ Sovereign reign: 100 years who can not go anywhere.
@ Flying classics: I have to go! Let it sit neutrino spacecraft, less than six years on to the ... ...
@ Only the grapes skin: how much one square meter price? Temporary residence permit or not to do?
@ Elephant micro theory: human nature is not completely correct the relationship with the world, the universe will not give their living space. How to think how greedy vain.
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