Also known as frame dragging, an effect in discovered in 1918 by Joseph Lense and Hans Thiring as an outcome of the general theory of relativity. In the Lense-Thiring effect, a compact rotating body, such as a neutron star or black hole, causes the spacetime near it to rotate in the same direction. It may lead to closed time-like paths. Such time machines as the Godel universe, the Kerr black hole, and the van Stokum cylinder are examples of the Lense-Thiring effect in action, as, in some sense, is the Gott loop, since a couple of cosmic strings passing each other would have an enormous angular momentum as a system.
Related category• SPACE AND TIME
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