Left: Model SED fits to the observed SED of AA Tau using from top to bottom: IRAC points only, JHK + IRAC points, JHK + IRAC + MIPS 24 μm + MIPS 70 μm, UBVRI + JHK + IRAC + MIPS 24 μm + MIPS 70 μm, and UBVRI + JHK + IRAC + MIPS 24 μm + MIPS 70 μm + submillimeter points (when more than 200 model SEDs fit the data well, we show the 200 best‐fit SEDs, and one in 10 SEDs beyond this). Center and right: Selection of parameters for the model fits. Filled circles are the good fits shown in the SED plots. The gray scale shows the parameter space of the grid of models (smoothed). Each shade of gray shows an increase in a factor of 10 in the density of models.