It may be considered a first attempt in finding the metric of a spinning black hole.
It is sometimes also used in homogeneous but anisotropic cosmological models formulated in the framework of general relativity.
[citation needed] The underlying Taub space was found by Abraham Haskel Taub (1951), and extended to a larger manifold by Ezra T. Newman, Louis A. Tamburino, and Theodore W. J. Unti (1963), whose initials form the "NUT" of "Taub–NUT".
, and Newman, Tamburino and Unti showed how to extend the metric across these surfaces.
One of the two other parameters was the NUT-parameter, which he threw out of his solution because he found it to be nonphysical since it caused the metric to be not asymptotically flat,[2][3] while other sources interpret it either as a gravomagnetic monopole parameter of the central mass,[4] or a twisting property of the surrounding spacetime.