Earth's "brother".

<P Align=center> </ P> <P> 13, a U.S. team of astronomers announced that they had 15 light-years from Earth in the constellation Aquarius discovered a planet outside our solar system so far discovered with planet Earth's most .similar, but the temperature is not suitable for the planet's life forms known. .</ P> <P> scientists in the United States National Science Foundation, the day held a press conference announced the discovery, their paper has been submitted, "Astrophysical Journal", published in the near future is expected. .Auspices of the U.S. team of astronomers, Professor University of California, Berkeley, Geoffrey Marcy, stressed that this is the first time that Earth-like, around a normal star of rock stars, it is like the Earth's "big cousin." .</ P> <P> Aquarius planet around the star, "Gris 876," the third planet. ."Gris 876" belongs to the galaxy of the most common type of red dwarf stars, astronomers had found in the surrounding gas formed by the two main, similar to the planet Jupiter. .Recently, astronomers have known of the two planets orbit analysis of anomalies and observations with more sensitive equipment, and finally found a third planet. .</ P> <P> planet Earth is equivalent to 2 times the radius, the quality is equivalent to 7.5 times the Earth. .Because of its stars from the "Gris 876," only 120 million kilometers of distance, roughly equivalent to 10 times the radius of the star itself, resulting in orbital period is only about two Earth days. .Astronomers think the planet's core may be iron or nickel composition, surface coverage of silicon, and may even have water vapor in the atmosphere. .</ P> <P> Previously, astronomers found a total of about 150 extrasolar planets, but they are more than 15 times Earth's mass gaseous planets, the newly discovered planet closest to the quality and composition of the Earth. .</ P> <P> as too close to the planet and the star, its surface temperature reaches 200 to 400 degrees Celsius. .Astronomers believe that it does not fit any known life form, but its discovery indicates that the universe may be more suitable for small life forms known to rock the planet. .(End) </ P> <P> What is the significance of this find concrete? .</ P> <P> U.S. astronomers find the Earth "big cousin" What is the specific meaning of this finding? .Looking for planets similar to the human future, what boost? .Purple Mountain Observatory, this reporter interviewed the researcher thought the king. .</ P> <P> the king thought that, so far scientists have discovered about 145 extrasolar planets, like Jupiter, as they are formed by the gas, "big man", the quality is generally 15 times the Earth, density .low air pressure, will not have any life form. .The newly discovered planet Earth is equivalent to 2 times the radius, mass only about 7.5 times the Earth, which in the past is never over, although the planet's surface temperature too high, up to 204-371 degrees Celsius, can not .support the existence of life on Earth similar to, but this time on the argument that the Earth is not "alone" has a great role in promoting. .</ P> <P> the king thought that the international astronomical organization dedicated to working on a recently discovered extrasolar planets satellite launch is expected in 5-10 years to God, re-use spectrum to determine whether the presence of oxygen on the planet and methane ., I believe the Earth's real "brothers and sisters" will emerge, "perhaps in the future we can exchange with the intellectual life and common progress it." .</ P>.