Asteroid Ryugu contains material older than the planets, among the most primitive ever studied on Earth


The asteroid Ryugu contains some of the most primitive material ever studied in a laboratory on Earth, dating back to just 5 million years after the formation of the solar system, according to an analysis of samples retrieved by Japan’s Hayabusa2 mission.

Because it is so old, it is made of the same stuff that formed the planets. “Ryugu is one of the building blocks of Earth,” team-member Hisayoshi Yurimoto, a professor at Hokkaido University in Japan, told