Is there a second planet suitable for human habitation?

As early as February 20 17, NASA announced the discovery of a second planet suitable for human habitation.

20 17 On February 22nd, the National Aeronautics and Space Administration announced a new discovery: a planet suitable for human existence except the Earth was discovered. Astronomers say that seven Earth-sized Earth-like planets have been discovered around a star 40 light years away from the Earth.

Three of them must be located in the livable zone, and they may all have water, so the possibility of life is extremely high. This planetary system is called TRAPPIST- 1 and is located in Aquarius.

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After the announcement of NASA, American space researchers said that they never dreamed of finding them. Finding this planetary system is like winning the first prize in astronomy.

Among the seven temporarily discovered planets, they are named from 1b to 1h respectively, and their heads are similar to those of the earth. According to the observation data, the orbits of all seven planets around this star are much closer than that of Mercury around the sun. The innermost planet 1b has an orbital period of only 1.5 days, which means that it can complete its revolution in 36 hours a year.

The period of the outermost planet 1h is only 14-25 days. In addition, because the planets are very close, on each planet, looking up at the sky, you can see other planets in the Milky Way.

People's Network-Earth is not on the list: NASA has discovered an alien planet suitable for human habitation.