zankaon

December 27, 2011

Oort Cloud – not gravitationally bound? Hence angular inertia describing outer extent of stellar systems?

Filed under: Letters from Ionia — Tags: — zankaon @ 7:01 pm

Hipparcus indicates that our supposed closest star alpha Centuari is 742 marcs parallax, which corresponds to about 1.3 pc or 4.3 lyrs away. Stars form in  multiple, such as for clusters of 100s -1000s. Some such sister stars must be close by; thus our sun has sister star(s) at closer distance, with higher parallax values.

Look to the sky; all things being equal, brighter means closer. Also infrared telescope could be used to look for cold gas giants, and compare image size for relative closeness. In fact does the Brown dwarf survey, and other surveys, include some large infrared planets which might indicate a nearby sister star? Such sister stars would have a center of mass, and hence a central force. But would one have a spherical distributed cometary cloud?

Might the Oort cloud not be gravitationally bound; but rather via angular momentum transfer of objects from KBO region, remain in orbit with constant speed (i.e. no central force, and hence no Kepler Laws) – hence designated as angular inertia? Thus is outer extent of stellar systems defined, not by gravitation, but by such angular inertia, in a flat 3-space? Would calculations be consistent with no gravitational field  i.e. no curvature, at such Oort cloud distance? Likewise for neutrino belt?

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