Solar system HD 10180 may be the record for most planets


10/04/2012

HD 10180, we can intercept the palm of the number of planets. Astronomer Mikko Tuomi, University of Hertfordshire, examined data on the solar system around the star HD 10180, has come to the conclusion that it is likely to consist of nine planets. This makes it the largest by number of planets known to date. Our solar system, taking into account the loss of Pluto from planet status, consists of eight planets. He will publish his findings in the journal Astronomy and Astrophysics, which will describe how, having studied the light variations star under the influence of gravity of the planets, he discovered the seventh planet, as well as for the existence of two more.

HD 10180 is located about 130 light-years away in the constellation Hydra South. This solar system has been discovered by astronomers in 2010. Then the scientists have found that it contains a total of five planets, although put forward the hypothesis that there may be seven. Later, another study showed that planets are probably six, five of which are comparable to the mass of Neptune, and the rest of this indicator is closer to Saturn. Scientists came to this conclusion by studying the fluctuations stars (Doppler shift), which occurs under the influence of gravitational pull of planets orbiting around it. Watching these small shifts, astronomers can calculate not only the size of the planets, which are the root cause of this behavior star, but also during their rotation. The above-described period of rotation of the planet are from 5 to 2000 Earth days.

Twomey did not make any new observations, and instead, examine the source data using other techniques of statistical analysis. It is possible to detect evidence of the existence of three other planets that are much smaller than the first six. These new planet dimensions for its calculations are 1.3, 1.9 and 5.1 of the earth are much shorter periods of rotation (1.2, 10 and 68 days) than the rest of the planet, indicating that they are closer to their parent star than Mercury is to our sun. This means that their temperature is too high to sustain life in the form in which the planet.

It is important to note that this work does not in itself is not conclusive proof of the real existence of these planets around HD 10180. She just has identified strong evidence in favor of this hypothesis. Also, the statistical calculations Twomey, provided evidence that in the case of the real existence of these planets, they have stable orbits.

Original: Physorg


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