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Particle Physics at the Tercentenary of Mikhail Lomonosov
We consider test planet and photon orbits of the third kind inside a black hole, which are stable, periodic and neither come out of the black hole nor terminate at the singularity. Interiors of supermassive black holes may be inhabited by advanced civilizations living on planets with the third-kind orbits. In principle, one can get information from the interiors of black holes by observing their white hole counterparts. Orbits of the third kind were described in [1, 2, 3, 4, 5] under thedoi:10.1142/9789814436830_0057 fatcat:3vkdmmobjvhivm5pqwkvleao5i