Star lifting is any of several hypothetical processes by which a highly advanced civilization (at least
Kardashev-II) could remove a substantial portion of a
star's matter in a controlled manner for other uses. The term appears to have been coined by
David Criswell.Stars already lose a small flow of mass via
solar wind,
coronal mass ejections, and other natural processes. Over the course of a star's life on the
main sequence this loss is usually negligible compared to the star's total mass; only at the end of a star's life when it becomes a
red giant or a
supernova is a large amount of material ejected. The star lifting techniques that have been proposed would operate by increasing this natural
plasma flow and manipulating it with
magnetic fields.
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