Recent years have seen the emergence of a new approach to the laboratory simulation of astrophysical phenomena. Current experiments are designed to address, with good dimensionless scaling, specific physical issues that matter to the astrophysics. These include experiments to address the hydrodynamic evolution and instabilities in supernova remnants, experiments to address hydrodynamic instabilities in core-collapse supernova explosions, and experiments to address the structure of thermonuclear supernova explosions. They are contrasted with somewhat older experiments that made first attempts in this direction, examining high-velocity spherical expansions into unmagnetized plasma, and the deceleration of spherical expansions by a magnetic field. ¿ 1999 American Geophysical Union