Schematics of DART impact and the following reshaping processes. (a) The DART spacecraft hits Dimorphos, generating ejecta. (b) While the dynamical state of the ejecta evolves, the mutual orbit becomes shorter by ∼33 minutes. (c) DART-driven ejecta settles on Didymos, causing the first phase of reshaping (Modification I). (d) Spin-driven reshaping results from surface disturbance due to collisions of ejecta with Didymos, causing the net changes in Didymos’s spin and Dimorphos’s orbit (Modification II).