Malona

A planet in our star system that is now the asteroid belt that lies between Mars and Jupiter, it was once a home for over 400,000,000 human beings who were descendants from the genetically manipulated peoples that originated from the Sirius star system, long ago. 73,000 years ago the human beings on Malona fought each other in a war that ended with the planet's destruction.

Malona, also called Malon and Phaeton, is mentioned by Semjase in the Contact Report 004:

109. Man on Earth must get accustomed to the thought that his predecessors have forced all of mankind and Earth itself to the brink of ruin, and had to partially evacuate the planet in a wild escape.

110. It should also serve as a warning to him that thirst for power and barbarism are attributes that bring death.

111. A second race also had to experience this truth in your solar system.

112. In their unlimited hatred and unquenchable thirst for power, they destroyed themselves right down to the last man, and scarcely a creature survived the conflict.

113. They eliminated and destroyed their own planet with a huge explosion and nothing remained of it but the many thousands of asteroids, which today still circle your sun — as a reminder of the human beings’ deadly irrationality.

114. (These asteroids are) remnants of the once thriving planet "Malona", which was destroyed by its inhabitants in their barbarian thirst for power and irrationality.

Billy also mentioned how Malona was destroyed in Contact Report 251:

Malona, or rather Phaeton, was destroyed in fratricidal wars by its genetically-manipulated inhabitants who had originally come from the Sirius regions, and who blew up the planet by diverting parts of an ocean into the subterranean or underwater magma chambers of a gigantic volcano. The SOL System's Asteroid Belt contains fragments of this former planet, whose orbit was not where the Asteroid Belt is today but was located where Mars orbits the Sun today, and Mars at one time was located where the asteroid belt is today. This position reversal was caused by immense upheavals in which the Destroyer (planet) played an important role. The planetary locations of Mars, Earth and Malona/Phaeton, and solar systems on the other side of our galaxy, in the Milky Way, where the two yellow races settled down, were selected as effective hide-outs by these races' benefactors, who were the conspirators for the escape of the genetically-manipulated people.

Also mentioned in Contact Report 251 is how the inhabitants of Malona constructed cities, pyramids, stations and other things:

Upon leaving the Sirius regions, the other genetically-manipulated peoples found a way to the SOL System, where several thousands of rebellious genetically-manipulated people had previously been banished to a myriad of terrestrial locations as a punishment. These masses of diverse races found refuge on the planets Mars and Malona/Phaeton, respectively, where they constructed cities, pyramids, stations and other things.

Modern Planet V Hypothesis

While the term Phaeton originates from a hypothesis developed in the 16th and 17th century. In the 21st century, the term 'Planet V' has been developed for the same or similar phenomena.

Planet V is a hypothetical fifth terrestrial planet posited by NASA scientists John Chambers and Jack J. Lissauer to have once existed between Mars and the asteroid belt. In their hypothesis the Late Heavy Bombardment of the Hadean era began after perturbations from the other terrestrial planets caused Planet V’s orbit to cross into the asteroid belt. Chambers and Lissauer presented the results of initial tests of this hypothesis during the 33rd Lunar and Planetary Science Conference, held from March 11 through 15, 2002.

In the Planet V hypothesis five terrestrial planets were produced during the planetary formation era. The fifth terrestrial planet began on a low-eccentricity orbit between Mars and the asteroid belt with a semi-major axis between 1.8 and 1.9 AU. While long-lived this orbit was unstable on a time-scale of 600 Myr (million years). Eventually perturbations from the other inner planets drove Planet V onto a high-eccentricity orbit which crossed into the inner asteroid belt. Asteroids were scattered onto Mars-crossing and resonant orbits by close encounters with Planet V. Many of these asteroids then evolved onto Earth-crossing orbits temporarily enhancing the lunar impact rate. This process continued until Planet V was lost most likely by impacting the Sun after entering the ν6 secular resonance.

As an initial test of the Planet V hypothesis Chambers and Lissauer conducted 36 computer simulations of the Solar System with an additional terrestrial planet. A variety of parameters were used to determine the impacts of Planet V’s initial orbit and mass. The mean time at which Planet V was lost was found to increase from 100 Myr to 400 Myr as its initial semi-major axis was increased from 1.8 to 1.9 AU. Results consistent with the current Solar System were most common with a 0.25 Mars mass Planet V. In cases with a larger mass Planet V collisions between planets were likely. Overall a third of these simulations were deemed successful in that Planet V was removed without impacting another planet. To test whether Planet V could increase the lunar impact rate they added test particles to one of the simulations. After an initial decline the number of particles on Earth-crossing orbits increased after Planet V entered the inner asteroid belt a pattern consistent with the LHB. These results were presented at the 33rd Lunar and Planetary Science Conference.

In a later article published in the journal Icarus Chambers reported the results of 96 simulations examining the orbital dynamics of the Solar System with five terrestrial planets. In a quarter of the simulation Planet V was ejected or impacted the Sun without other terrestrial planets suffering collisions. This result was most frequent if Planet V's mass was less than 0.25 of Mars. The other simulations were not considered successful because Planet V either survived for the entire 1 billion year length of the simulations or collisions occurred between planets.

The terrestrial Planet V hypothesis was later examined by Ramon Brasser and Alessandro Morbidelli. Their work was the first to focus on the magnitude of the bombardment caused by Planet V. Brasser and Morbidelli calculated that to create the Late Heavy Bombardment Planet V would have to remove 95% of the pre-LHB main asteroid belt or 98% of the inner asteroid belt (semi-major axis < 2.5 AU). Depleting the main asteroid belt by 95% with a 0.5 Mars-mass Planet V was found to require it remain in an orbit crossing the entire asteroid belt for 300 Million years. This orbital evolution was not observed in any simulations, Planet V typically entered an Earth-crossing orbit resulting in a short dynamic lifetime before entering such an orbit. In a few percent of simulations Planet V remained in the inner belt long enough to produce the LHB. However, producing the LHB from the inner asteroid belt would require the inner asteroid belt to have begun with 4–13 times the mass, and 10-24 time the orbital density, as the rest of the asteroid belt.

Brasser and Morbidelli also examined the hypothesis that Planet V caused the LHB by disrupting putative asteroid belts between the terrestrial planets. The authors noted that the lack of present day detection of the remnants of these belts places a significant constraint on this hypothesis, requiring that they be 99.99% depleted before Planet V was lost. While this occurred in 66% of the of simulations compatible with the current Solar System for a Venus-Earth belt it did not occur in any for the Earth-Mars belt due to its higher stability. Morbidelli and Brasser concluded from this result that an Earth-Mars belt could not have contained a significant population. Although Planet V could generate a Late Heavy Bombardment by disrupting a massive Venus-Earth belt alone the authors observed that significant differences in these belts has not been produced in planetary formation models. It is also the name given to a fifth planet by Van Flandern, but with a different theoretical basis.

Further Reading

• Phaeton