![\"Earth\u2019s](\"https:\/\/www.newsbeep.com\/il\/wp-content\/uploads\/2025\/12\/Earths-Moon-is-thought-to-have-formed-in-a-tremendous-collision.jpeg.webp.webp\")
Earth\u2019s Moon is thought to have formed in a tremendous collision. Credit: NASA<\/p>\nFor decades, scientists have held to the idea that the Moon was formed by a single, massive impact between Earth and a Mars-sized body known as Theia. But recent research suggests the truth might be more complicated. New models propose that the Moon\u2019s birth could have involved not one, but three significant collisions in the early days of the solar system.<\/p>\n
This new hypothesis could solve some lingering questions about the Moon\u2019s composition and its connection to Earth. The three-impact theory challenges the traditional single-impact model, which has struggled to explain certain chemical differences between Earth and the celestial body.<\/p>\n
The Traditional Model: One Giant Impact<\/p>\n
The most widely accepted explanation for the Moon\u2019s formation has been the giant impact theory. According to this model, Earth collided with Theia, a body roughly the size of Mars, around 4.5 billion years ago. The impact sent a massive amount of debris into space, which eventually coalesced to form the Moon. This theory has been supported because it explains many of the similarities between Earth and the Moon, particularly their compositions.<\/p>\n
However, some problems remain. For instance, the Moon and Earth have subtle differences in chemical composition, such as variations in their oxygen isotopes, which are difficult to reconcile with the idea that the lunar body formed solely from Earth\u2019s debris. This has led researchers to reconsider the single-impact hypothesis and explore alternative explanations, such as the possibility of multiple impacts.<\/p>\n
Earth\u2019s Moon is thought to have formed in a tremendous collision. Credit: NASA<\/p>\n
A New Theory: Three Impacts Instead of One<\/p>\n
Recent research, available onMonthly Notices of the Royal Astronomical Society<\/a>, suggests that the Moon\u2019s formation could have been the result of not one, but three major impacts.<\/p>\n According to this model, Earth was struck multiple times by objects of varying sizes, including Theia<\/a>, over the course of its early history. These successive collisions would have contributed to the accumulation of material that eventually formed the Earth\u2019s satellite.<\/p>\n This multi-impact theory offers a more satisfying explanation for the chemical and isotopic differences between Earth and the Moon. For example, it could account for the Moon\u2019s relatively lower density compared to Earth, as well as the differences in their isotopic makeup. Multiple impacts would have allowed the lunar sphere to gather material from various sources.<\/p>\n \u201cAfter three impacts, we put enough mass into orbit to make a full moon,\u201d said\u00a0Philip Carter<\/a>\u00a0at the University of Bristol.<\/p>\n Shifting Views on the Birth of the Solar System<\/p>\n A multi-impact scenario suggests that Earth\u2019s early history<\/a> was even more chaotic than previously thought, with numerous large bodies colliding with our planet over time. <\/p>\n Also, the Moon\u2019s formation<\/a> is crucial to understanding Earth\u2019s long-term climate stability. The Moon\u2019s gravitational influence has helped stabilize Earth\u2019s axial tilt, contributing to a relatively stable climate. If the silver sphere was formed through multiple impacts, it may also change how we think about the conditions that allowed life to develop on Earth.<\/p>\n Testing the New Model<\/p>\n Although the three-impact theory is still a hypothesis, scientists are working to test it through computer simulations and analysis of lunar samples. If proven correct, this new model could significantly alter our understanding of the Moon\u2019s origin and the early dynamics of the solar system<\/a>.<\/p>\n