My research is focused on large-scale 3-D simulation of gaseous astrophysical systems, particularly stars, and analysis and visualization of the multi-TB datasets that each such simulation produces. With collaborators in Canada, we are building tools to perform the simulations on the largest systems available and to explore the datasets generated in multiple ways. A particular focus is now to post-process the simulation data so that it can be compared to satellite observations of stars using asteroseismology. There is also a focus on nucleosynthesis and its observable consequences at the stellar surface. We perform a handful of large simulations each year, which produce approximately 100 to 400 TB of compressed data each. One goal of our efforts is to make data of this sort shareable with collaborators over the Internet, beginning with the most highly compressed data products but with the intent to go eventually to data in multiple variables, 3 dimensions, and time.