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"We proposed that tiny meteorites, called micrometeorites, containing ammonia compounds were delivered from icy celestial bodies and collided with Ryugu," said Toru Matsumoto, lead author of the study and assistant professor at Kyoto University.

Members of the School of Physics and Astronomy from the University of Kent are hoping to find micrometeorites - dust sized particles which have made it through the earth's atmosphere.

Though Roscosmos said the information was undergoing analysis, the agency reported that the preliminary data obtained contained information about the chemical elements of the lunar soil and that its equipment had registered a “micrometeorite impact.”

It added that its equipment had registered "the event of a micrometeorite impact".

It was not clear whether they were hit by micrometeorites or had manufacturing defects.