In a research published in the journal Nature, researchers have revealed what might be the reason behind the chemical similarity between Earth and Moon.

Researchers from the French University Bordeaux and Haifa-based Israel Institute of Technology explained that materials which formed Earth as well as the moon are more or less similar.

Computer simulations suggested that the after-effects of the great collision of Earth's twin and impactor called Theia might have accreted on Earth. It might have also been possible that a portion of the debris of Theia was ejected and coagulated, which formed the Moon.

The researchers studied 40 stimulation of inner planets' growth in our solar system. The formation of these planets happened due to collision of smaller particles, which stuck and glued together forming the embryos of planets. After the stimulations ended, only three or four huge planets were residing in the solar system.

Alessandra Mastrobuono-Battisti of Israel explained that researches have detailed data regarding the accreted of each planetesimals pertaining to every single planet. Thus, they are aware of the fundamental compositions of these impactors as well as the planets that they have affected.

Although earlier studies have revealed that there are just 1% chances that Earth was similar to Theia in terms of chemical compositions, the stimulation model found ten times higher resolution than the prior ones.

This indicated that the planetesimals on which they began were smaller. Therefore, there are is 20-40% chances of similarity between Earth and Theia, and possibly the two are composed on same substances.

Scientists determined the origins of planets and large asteroids in the solar system by the ratios found in their elements. Since the Moon is similar to the Earth's mantle, Theia was also formed in the same region in the solar system near the Earth.