Cécile Engrand (A2C Pole, Astrophysics & Cosmochemistry Team) collaborates on the Hayabusa2 mission of the Japanese space agency (JAXA) to return samples from the asteroid Ryugu. The Hayabusa2 probe landed on Earth in Australia on the night of December 5-6, 2020 after traveling for about a year. This is the first time that fragments of a primitive carbonaceous asteroid will be analyzed on Earth. A period of preliminary analyzes in Japan will be followed by more detailed analyzes by international teams, including around 20 CNRS researchers. It was in February and July 2019 that the Hayabusa2 probe contacted the asteroid Ryugu in order to fire a small projectile on its surface aimed at collecting samples of primitive material by impact. Just like OSIRIS-REx, MMX and MSR, Hayabusa2 is a round trip mission whose objective is to collect and bring back to Earth extraterrestrial samples for their analyzes by high performance instruments that cannot be sent. on the spot. These missions provide incomparable information that cannot be obtained by in situ analyzes.