Astronomers discover the "cousin" of the earth, is it just around the corner to emigrate to other planets?

Doomsday theory has been active on various platforms. First, the Mayans predicted that the earth would be destroyed in 200 years. If human beings want to continue, they must emigrate to Mars or other planets. In fact, before Hawking made his own prediction, human beings had been exploring new ones. Earth? .

Many scientists also believe that the earth is not special among the vast galaxies? Lucky? , the United States is like heaven? Pioneer? They have been studying planets like the earth. According to the report of the National Aeronautics and Space Administration, they found a very mild planet similar to Earth, Kepler-186f.

Kepler-186f is located in Cygnus, and its size is about 1. 1 times that of the earth. This planet is the first exoplanet found next to a star other than the sun, but its surrounding environment is similar to that of the solar system, because Kepler-186f has a moderate distance from the star, and it orbits the central star once every 130 earth days.

It gets only one-third of the solar energy of the earth, but it also belongs to? Livable area? However, NASA speculates that the average temperature of Kepler-186f is lower than that of the Earth, and even if there is water, it should freeze. Astronomers discovered Kepler-186f by transit method, which lasted nearly three years.

Unable to travel to Kepler-186f, astronomers infer the density and mass of Kepler-186f by observing its surface. On the surface, Kepler-186f is similar to the earth? Twins should be one-third of iron and two-thirds of silicon in mass and density, belonging to rocky planets.

Although Kepler-186f can only receive one third of the solar energy, NASA also found that Kepler-186f has a very stable tilt angle during its rotation, which also means that Kepler-186f has obvious seasonal variation and a good atmospheric environment.

Scientists do not rule out that advanced life forms may have been born on the planet. By 20 14, astronomers had tried to use Allen telescope array to receive radio waves from Kepler-186f, but for more than a month, they had not received any signals related to alien intelligent life science and technology.

However, many astronomers also believe that if the radiation source is isotropic, the radio waves emitted by Kepler-186f need at least 10 times the receiving capacity of Arecibo Observatory (the second largest single aperture radio telescope in the world), which is possible, but human science and technology can't meet this requirement at present.

Kepler-186f is very similar to the earth, but there are too many things to explore. First, whether the atmosphere on Kepler-186f is suitable for human survival, even if the chemical composition of the atmosphere is studied, there is a more important question. Kepler-186f is 500 light years away from the earth.

With current technology, it will take at least thousands of years to reach Kepler-186f, and Hawking's prediction is only 200 years left.