but Before our Solar system appeared on the planet, it was inhabited by planetesimals. Scientists think that most meteorites that have fallen to the Ground are remains of these planetesimals.

Scientists also believe that planetesimals or completely dissipated, in the early stages of their history, or were nothing more than clusters of stones or debris.

But one of the collections of meteorites that have been discovered around the globe, seem to have originated from planetesimals, which bucked the trend.

A new study shows that one family of meteorites, originates from the same parent cosmic body. And this suggests that the cosmic body was both molten, and debris. For scientists it is a mystery.

A new study of these results, called “Meteoritic evidence of partial differentiation and long-term accretion of planetesimals”. Lead author — Clara Maurel, post-graduate student of the faculty of Earth Sciences, atmosphere and planets at mit (EAPS). A study published in the journal Science Advances.

Our system of classification of meteorites suggests that no single parent body cannot be a source of molten (chondritic) and unmelted (chondritic) meteorites. This follows from our understanding of how planetesimals formed.

Models show that they are formed almost instantly, which prevents them from melting.

Long ago the hypothesis that planetesimals can be differentiated as the melted and unmelted, but the evidence is hard to find.

But in this study, the researchers found confirmation. Planetesimals could be more than we expected. According to the research team, the mother’s body the rare group of meteorites discovered on Earth, should be differentiated, with a melted and unmelted layers.

This was also the liquid metal core. And it is the core of creating a powerful magnetic field.

“This is one example planetesimal, which must have had fused and unfused layers,” says Maurel in a press release.