We discuss high-resolution, far-infrared spatial observations of low m
ass embedded young stellar objects in the Taurus molecular complex. By
comparing the observed spatial extent with the results of radiative t
ransport models, we can estimate the density distribution of the envel
opes, We compare the initial results for 4 objects (L1551-IRS 5, L1489
-IR, L1551-NE, and L1527-IR) with star formation theories.