New discovery: the Earth 3 times the mass of the lightest extrasolar planets (Figure).

<P Align=center> Keywords: quality of the lightest extrasolar planet Earth </ P> <P align=center> </ P> <P> artists depicted the new planet MOA-2007-BLG-192Lb operation around the parent star .Scenario </ P> <P> According to the U.S. space network reported that the U.S. astrophysicist June 3 announced that they found in the Milky Way the smallest so far observed extrasolar planets, such as a miniature covered by deep-sea .objects. .This super-Earth number MOA-2007-BLG-192Lb, is only 3 times the Earth mass weight, the lightest in April this year to break the extrasolar planet GJ 436c has a record of 5 times Earth's mass to compete for the throne of the lightest extrasolar planets .. .World Scientific reports </ P> <P> this super-Earth to its parent star MOA-2007-BLG-192L named, about 3,000 light years from Earth (one light year is about 9.46 trillion km.) .Measurements show that the parent star's mass is only about 6-8% of the solar mass. .The quality is lower than the core of the star quality needed to sustain a nuclear reaction, therefore, MOA-2007-BLG-192L is a brown dwarf. .</ P> <P> responsible for the study of the U.S. Indiana University of Notre Dame professor David Bennett said: "Our findings show that the lowest mass stars also have planets running around it. Previously discovered planets .quality of less than about 20% around solar mass stars operate. However, this finding suggests that we can expect to find low mass stars near the sun and the earth has a considerable mass planets. "published in the Knight found this 3 day meeting of the American .Astronomical Society of the General Assembly. .World Scientific reports </ P> <P> astronomers also noted that the theory of planet formation show that the planet is most likely composed of rock and ice. .The planet and its star is equivalent to the distance between the distance of Venus from the sun, and this dim parent star than the sun 3000-10000 times, so the top of the atmosphere the planet Pluto is lower than the temperature. .However, this micro-asteroids have a thick atmosphere, and it may have some inside by the internal heat generated by radioactive decay, making it as a moderate surface temperature and the Earth. .Even the theoretical calculations show that the planet's surface was completely covered with the deep ocean. .</ P> <P> scientists micro lens by gravity method to find the stars and planetary systems. .In this method, the light from this planet is a celestial body, such as significant as the star's gravity bending and amplification. .This is the scientist to use this technology to discover the seventh planet. .The Professor Knight said: "This discovery confirms a planet used to find low-quality approach to micro lens, high sensitivity, and we are looking to the near future the quality of Earth's first major discovery of planets." </ P> <P .> So far, scientists have discovered more than 200 operating satellites around other stars, extrasolar planets. .The research results will be published in the September 1 issue of "Astrophysical Journal" on. .World Scientific reports </ P> </ p>.