How unstable and temporary a point locus proves to be, varies according to a wide range of factors. These include: the number of FP generators used, distance, and a multitude of more subtle factors involving a lot of specific features of the galactic neighborhood—dust cloud densities, nearby novas or neutron stars, etc. Creating a point locus is as much as art as a science, as well as being extremely expensive, and is never something to be undertaken lightly.
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