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Old 15-07-2011, 11:21 AM
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CraigS
Unpredictable

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Join Date: Jul 2010
Location: Australia
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Unpredictable Trinary Exoplanets

The conjugate of what is reported in the 'Earth's Orbit Unpredictable !' thread ….
New planet discovered in Trinary star system

Quote:
Until recently, astronomers were highly skeptical of whether or not planets should be possible in multiple star systems. It was expected that the constantly varying gravitational force would eventually tug the planet out of orbit. But despite doubts, astronomers have found several planets in just such star systems. Recently, astronomers announced another, this time in the trinary star HD 132563.

With the discovery of this new planet, the total number of discovered planets in multiple star systems lies at eight. While this is rather small numbers from which to draw firm conclusions, it appears that planets can be commonly found orbiting the more remote members of trinary star systems for good periods of time. On the shorter end, the stellar system is anticipated to be 1-3 billion years in aged, based on the amount of stellar activity and amount of lithium present in the star’s atmosphere (which decreases with time). However, fitting of the mass and luminosity onto isochrones suggest the stars may be as much as 5 billion years in age.

In either situation, the planetary system is dynamically stable.
Also based on these eight systems, the team also suggests that planets existing around such far removed members of a multiple star system may be as common as planets around wide binaries, or even single stars.
The bottom line is that purely deterministic physics models in this instance, did not make accurate predictions for the existence of stable planetary orbits. This is exactly what chaotic models tell us, however … ie: chaos and order will occur and we cannot predict where or when it will occur.

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