Planets, maybe even advanced life, could theoretically exist inside a black hole according to a new theory.
The idea, by physicist Professor Vyacheslav Dokuchaev from the Russian Academy of Sciences in Moscow, appears to go against the common belief that black holes are giant gravity wells gobbling up anything that gets too close.
Dokuchaev says supermassive black holes at the centre of galaxies could allow particles, and perhaps even planets with life, to orbit the singularity without being destroyed. The singularity is located at the heart of a black hole, and is the place where the laws of physics and space-time break down.
It's surrounded by the event horizon, a region beyond which objects need to travel faster than the speed of light to escape the black hole. Because nothing can theoretically travel faster than the speed of light, nothing escapes once it's passed the event horizon.
In his paper, Dokuchaev studies hypothetical orbits in the area between the event horizon and the singularity to understand their dynamics. He says while conventional orbits wouldn't be possible, there are some places where particles and planets could have stable though unusual spiral orbits. Dokuchaev calculates such a planet would be brightly illuminated by the singularity and by photons trapped in the same orbit."This planet might even support a complex chemistry rich enough to allow life to evolve", says Dokuchaev."Advanced civilisations may live safely inside the black hole without being visible from the outside".
Dokuchaev admits such a civilisation would have to cope with extraordinary conditions including huge tidal forces and massive energy densities as photons become trapped. And he admits there's also the problem of causality violations, where the rules of space-time don't apply.
Astronomer Dr David Floyd from the Australian Astronomical Observatory and the University of Melbourne says even if the theory is correct, it would be impossible to know what is occurring beyond the event horizon of a black hole.
"At this point - and perhaps forever - we're restricted to making untestable assertions," says Floyd. But Floyd admits it opens up some interesting philosophical questions. "Given the number of black holes in the universe - lots - one might infer that life is inevitable inside at least one of them if there really are stable orbits," he says. "Maybe there are entire universes inside black holes."
Give the summary of the text using the words below:to exist inside a black hole; to go against the common belief; to orbit the singularity; to be located at the heart of a black hole; the event horizon; the problem of causality violations; to occur beyond the event horizon of a black hole.
Text 8. Probing the laws of gravity: A gravity resonance method
leap – скачок
minute – крошечный
to gain insight – понять
string theory – теория струн
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