Relativity and Cosmology


Why Do Planets Rotate Around Themselves ?

Authors: Ahmida Bendjoudi

It is commonly believed that the self-rotation angular momentum of planets is due to an original angular momentum of dense interstellar clouds at the formation stage of the stars. However, the study shows something completely dierent: a test planet in free-fall, in fact, follows two geodesics; the rst is the usual Schwarzschild path, and the second is a Schwarzschild-like path, dened (spatially) locally: an elliptical orbit in the plane (U(1)-variable, azimuthal angle). The analysis leads to the fact that: the motion along these geodesics (physically) is exactly the self-rotation of a charged test planet in Reissner-Nordstrom spacetime. The results reveal a more general understanding of Einstein equivalence principle: locally, gravitational eld can be (in the Reissner- Nordstrom space) replaced with an accelerated and rotated local frame.

Comments: 4 Pages. Submitted to IJMPD

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Submission history

[v1] 2017-04-12 11:28:30

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