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As an illustration of the value of historical measures we present someexamples of the dynamical evolution of multiple systems resembling the OrionTrapezium. We constructed models by combining carefully selected historicalmeasures of the separations among components of young massive stellar systemswith modern observations. By computing large numbers of fictitious systemsresembling real trapezia we were able to simulate the dynamical evolution ofsuch systems. Our results on the dynamical fate of the Orion Trapezium and often additional young clusters resembling the Orion Trapezium show extremelyshort dynamical lifetimes for these systems.

The Importance of Historical Measures for Dynamical Models of the Evolution of Trapezium-type Multiple Systems