" It is clear that Bhu Mandala, as described in the Bhagvatam, can be interpreted as a geocentric map of the solar system out ot Saturn. But an obvious and important question is: Did some real knowledge of planetary distances enter into the construction of the Bhu Mandala system, or are the correlations between Bhu Mandala features and planetary orbits simply coincidental?
Being a mathematician interested in probability theory, Thompson is better equipped than most to answer this question and does so through computer modelling of a proposed 'null hypothesis' -- i.e.,
'that the author of the Bhagvatam had no access to correct planetary distances and therefore all apparent correlations between Bhu Mandala features and planetary distances are simply coincidental.'
However, the Bhu Mandala/solar system correlations proved resilient enough to survive the null hypothesis. 'Analysis shows that the observed correlations are in fact highly improbable.' Thompson concludes:
'If the dimensions given in the Bhagvatam do, in fact, represent realistic planetary distances based on human observation, then we must postulate that Bhagvata astronomy preserves material from an earlier and presently unknown period of scientific development ... [and that] some people in the past must have had accurate values for the dimensions of the planetary orbits. In modern history, this information has only become available since the development of high-quality telescopes in the last 200 years. Accurate values of planetary distances were not known by Hellenistic astronomers such as Claudius Ptolemy, nor are they found in the medieval Jyotisa Sutras of India. If this information was known it must have been acquired by some unknown civilization that flourished in the distant past. "

― Graham Hancock , Underworld: The Mysterious Origins of Civilization