The Hollow Earth theory was modified many times during the succeeding centuries by the people who considered it seriously. Gradually the idea of a small star inside the Earth took shape. Leslie took it the furthest and suggested that two small binary stars were orbiting around each other at the centre of the planet.

All this talk of miniature stars took place long before the discovery of nuclear power. I wondered if a miniature nuclear star at the centre of the planet could be the cause of the geomagnetic field. I knew that nuclear explosions create powerful magnetic fields and so I wondered if a nuclear reaction could similarly create a magnetic field.

Stars, like our Sun, are driven by nuclear fusion. This is a process where very light elements are combined and this releases vast amounts of energy. One needs a considerable mass for such a reaction to actually work. But what of nuclear fission? This is where very heavy elements like uranium are split and this also causes a release of energy. The critical mass required for a nuclear fission reaction to work is actually very little. Could a little nuclear fission star exist inside a Hollow Planet?

The Earth's core is supposed to be the densest part of the planet. Currently scientists suppose the Earth's core to be composed of nickel and iron. But wouldn't it be logical to expect the densest matter in the planet to condense in the core and for there to be uranium among that matter? After all there is a great deal of radium which drives volcanic activity on the surface. Radium is nothing more than decayed uranium, therefore there must have been lots more uranium on the planet in the past. Might it not be possible that uranium in the Earth's core could start a naturally occurring nuclear fission reaction deep inside the Earth? Could such a thing actually hollow out a planet?

I spoke to a scientist from the South African Atomic Energy corporation and we discussed the conditions which would be required for a nuclear fission reaction to take place inside a planet. In the 1970's, French scientists discovered a site at Oklo, Gabon, Africa, where a nuclear fission reaction had taken place millions of years ago. It ran for millions of years. Scientists were fascinated as to how the reaction kicked itself off and proceeded to run for so long. I was to discover that some nuclear scientists had long predicted the possible existence of nuclear fission reactions but it had never received wide publicity.

An interesting experiment at the Kolar Gold fields in India some years ago resulted in scientists discovering that a very large number of nuclear particles were coming up from inside the Earth! These were the types of particles which they were expecting to be coming from the Sun. Could these be the products of an Inner Sun?

I stumbled upon some very bizarre astronomical research regarding Danjon's Law. Danjon was a French astronomer who studied bright eclipses of the Moon in the 1920's. He attributed the changing brightness of eclipses to be due to Solar activity. Using centuries worth of data he then calculated the solar cycle of the Sun based on these bright eclipses. The problem with Danjon's calculations is that they do not match the true solar cycle. Danjon's Law was debated amongst scientists for a long time. Then in the 1970's a French scientist re-evaluated Danjon's Law and reached the startling conclusion that the varying brightness of the Moon's eclipses was due to a source of light other than the Sun! An English scientist agreed with this assessment. But neither of them could suggest a source. What other source of light could there be? Is it possible that light from an Inner Sun inside the Earth can rise out through Polar Holes to fall on the Moon? There also seems to me to be evidence that the aurora borealis is actually a more powerful light source than scientists think, and some of the light might even be directed away from the Earth. It would seem to me as if the only possible source of light other than the Sun which could be causing the bright eclipses of the Moon would be the Earth. And since eclipses occur when the Moon is directly behind the Earth it follows that the sunlit side of the Earth can't be to blame. The light must therefore emanate from some other part of the Earth. Could it be that an Inner Sun has the ability to cast light on the Moon under certain refractive conditions? Furthermore, it was discovered that the brightest eclipses occur in winter - which is when a Polar Hole would be inclined towards the Moon...

Have I stumbled upon that most impossible of things - a nuclear fission Inner Sun floating freely in the centre of the Earth?