My interests center on supernovae and astrophysical gas dynamics. I have carried out modeling of supernova light curves, the effect of mass loss on a supernova, fallback of supernova gas to a central neutron star, the evolution of the bubble from a rotating neutron star through several stages of evolution, and the interaction of a supernova with circumstellar gas. The research involves making predictions for multiwavelength observations. My work on collisionless shocks explained the mysterious hydrogen emission from fast shock waves. On a larger scale, my research provided an analytical solution for galactic superwinds from thermalized supernova energy.