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В системе HD 10180, возможно, 9 планет

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The system in question here, HD 10180, has been observed by one of the most sophisticated planetary detection systems on our own planet, , the High Accuracy Radial velocity Planet Searcher. It's a very good star for this sort of observation, since it's bright, relatively nearby, and doesn't seem to experience much in the way of periodic variations. (In fact, the researchers found that the noise in the system was so low they had difficulty figuring out how best to include it in their model.)

To provide some indication of whether nine planets could happily get along in a compact system, they performed some basic modeling of stable orbits. Not only were the nine planets in relatively stable locations, but there were a couple of gaps that might also fit additional bodies. They estimate that these could be up to twelve times as massive as the Earth without creating a detectable signal in the existing data. So, as we examine HD 10180 further, there's a chance that more planets will make their presence known.

HD 10180 - Wikipedia, the free encyclopedia

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    The Current Procedural Terminology (CPT) code 10180 as maintained by American Medical Association, is a medical procedural code under the range - Incision and Drainage Procedures on the Skin, Subcutaneous and Accessory Structures.

    HD 10180 is another Sun-like star in Hydrus. It has the stellar classification of G1V, which makes it another yellow dwarf. It has an apparent visual magnitude of 7.33 and is approximately 127 light years distant from the solar system.