After performing numerous mathematical calculations and simulations, researchers suggests that our moon may have been formed not by one massive collision, but by multiple collision.
According to experts, it would take about 20 of these collisions to assemble the moon.
Speaking about the theory, lead author Dr. Raluca Rufu told the Business Insider that it is much more likely that the Moon formed from many smaller collisions, because it is a more organic process.
“The multiple impact scenario is a more ‘natural’ way of explaining the formation of the Moon,” Rufu said. “In the early stages of the Solar System, impacts were very abundant, therefore it is more natural that several common impactors formed the Moon, rather than one special one.”
Furthermore, Dr. Rufu believes that current theories do not explain satisfactorily why the moon is so similar to rocks on Earth.
“If multiple of bodies contribute to the final Moon, their chemical signatures can even out, therefore the traces of the various impacts will be masked,” she said. “Also, higher velocity impactors can excavate more Earth material, hence the moonlets will resemble the Earth’s composition.”
According to the authors, the impacts between large celestial bodies and the proto-earth that could create small moons was sufficiently common within the early solar system to produce the moon we see today.
This implies that the moon was formed in a period of several million years, and its interior may even hold evidence of that period of cosmic bombing.
This means that the Earth and Moon’s interiors are also less mixed up, and may have records of the events that eventually gave birth to both the Earth and the moon.
Gereth Collins of Imperial College in London, warns in an article accompanying the study in “Nature Geoscience” that more evidence is needed to confirm that this hypothesis is correct. Source: Ancientcode