SPring-8, the large synchrotron radiation facility

Chondrules formed in the high-temperature region inside the solar system were successfully identified in an ultrafine substance emitted from a short-period comet (a trans-Neptunian object) in joint research by Kyushu University, Ibaraki University, Osaka University, University of Wisconsin, National Aeronautics and Space Administration (NASA), Japan Synchrotron Radiation Research Institute (JASRI), and Advanced Industrial Science and Technology (representative: Tomoki Nakamura, associate professor of Department of Earth and Planetary Science, Faculty of Science, Kyushu University). The chondrules were highly likely to have been transferred from the inside to the outside of early solar nebula because the oxygen isotope ratio of the chondrules discovered was similar to that of the chondrules in primitive objects in the asteroid belt of the solar system. It is difficult to fully explain this mass transfer with the current solar system formation model, and thus, a new model is required.