Human beings in the Milky Way in the end there are no neighbors?Astronomers may have biological efforts to find planets, whose selection criteria is "habitable zone" (Goldilocks Zone), in a galaxy among planets or satellites if too close from the star, say the solar system, Mercury, will be roasted dry and can not exist life, but if the star is too far away from the planet or satellite, say Saturn's many moons, because of cold and frozen, can not have life survived only in an optimal distance interval, say the earth before may have liquid water, can produce life.
Therefore, although the planets in the Milky Way with the satellite more to count, but very few can be said to meet the conditions.
June 25, the European Southern Observatory (European Southern Observatory; ESO) brought us good news, in Scorpio, the 22 light-years away from us ─ ─ in the Milky Way which can be considered close range, it can be said in the solar system backyard ─ ─ Geli Xi 667 (Gliese 667) Samsung System C stars, previously only found it three planets, including one in the habitable zone, but the European Southern Observatory apply the new high-precision radial velocity finder system (High Accuracy Radial velocity Planet Searcher; HARPS) after re-examine the galaxy and found seven planets, including three in habitable zone, but bigger than the Earth.
In the habitable zone does not mean that we will be habitable, such as Venus and Mars are in the habitable zone, the small planets, like Mars, because of fast cooling, the magnetic field will soon decline, the result of Mars's atmosphere is no magnetic field under the protection of both light by the solar wind to blow, so there may be life on Mars had become barren, but these three newly discovered planet Earth than large, do not have this problem, but they are not big like Uranus, Neptune, like a gas planets, astronomers call them "super-Earth." So we may really have backyard neighbors.
European Southern Observatory at 22 light-years away from us Geli Xi 667 (Gliese 667) Samsung System C stars, found seven planets, including three in habitable zone, but also large than the Earth.
If there aliens living in this three planets, they will live what kind of life do? First of all, their "sun", Geli Xi 667C star, is the smallest of a star system, only one-third of the quality of our sun, so their much darker than our sun, so we at the equivalent of distance from the solar system Mercury is also within the habitable zone.
The other two systems Samsung Star Bigelixi 667C Schramm much more visible in the daytime, so if these three ranked habitable zone on the planet there are aliens, they will see in the sky during the day two bright stars, and the stars are brighter at night two was like our Moon.
However, during the day or at night, they will not turn, the planet's rotation speed which three are related to the same revolution speed, that is, they are always with the same side facing the sun, so there is always one side during the day, one side is always at night.
Will always be the day that side will probably become a super-hot desert, and never at night that side, there are the other two Samsung shine, perhaps still have vitality, but most likely there is life, probably only the junction of day and night which circle, so the aliens may be living there.
The hot side of the cold side of the planet, the atmosphere will often produce a huge storm, so these days should be alien friend had a very stimulating, it would probably be a very good science fiction theme now!
(Credit: European Southern Observatory)
