Density resulting from the HD simulations of G292.0+1.8 at an age of 2500 yr. The input parameters for the simulations are listed in Tables 1 and 2, and correspond to Run 1 (top), Run 3 (middle), and Run 5 (bottom). The pulsar is moving toward the southeast. Various features discussed in Section 3.2 are labeled with white arrows. While the reverse shock interacted with the entire surface of the PWN for Run 1, it has not yet reached the northwestern side of the PWN for the higher-ejecta-mass models.