Apart from the earth, which planet is known to be the most suitable for us to live in?

Astronomers found water vapor in the atmosphere of a distant planet in Leo, so this planet was called "the most livable planet known outside the solar system" by scientists. This is the first time that planets containing life-sustaining substances in the atmosphere have been found in the "habitable zone" of their stars (the temperature is neither too hot nor too cold, so liquid water can exist). This discovery has increased people's hope that this newly discovered planet, as well as similar planets discovered in recent years, not only has the conditions suitable for the existence of life, but also may exist in some cases.

Angelos Tsiaras, an astronomer at University College London, said: "This is the first planet discovered by human beings that has both water and a temperature suitable for human survival." "It is the best choice for human migration at present." This planet named K2- 18B was first discovered by NASA's Kepler mission in 20 15. It is about twice the size of the earth and eight times the mass of the earth. It orbits a cold red dwarf star less than half the size of the sun and is 1 10 light-years away from the earth.

The heat generated by a red dwarf is much lower than that of the sun, but K2- 18b is heated to about 10 degrees Celsius due to its orbit around its star. This planet is only14 million miles away from the earth, which is one sixth of the distance from the earth to the sun. It completes an orbit every 33 days, and its running speed in one year is equivalent to that of the earth in one month.

Today, human technology is still not advanced enough to photograph the surface of such a distant planet and send the detector to such a distant place. But space telescopes can collect some information about the atmosphere of other planets. Within two years after the discovery of K2- 18b, the research team of University College London made continuous observation with the experienced Hubble Space Telescope of NASA. In particular, they analyzed the starlight of the red dwarf when it passed through its surface on eight different occasions.