. I present 2-D angular power spectra of cold H I emission and optical dust reflection tracing the H I in the Pleiades reflection nebula. This analysis reveals a uniform power-law slope of -2.8 over 5 orders of magnitude in scale, from tens of parsecs down to tens of astronomical units. NASA ADS Abstract . Astro-ph Preprint (low-resolution): astro-ph/0703055 . Local copy (full-resolution): PDF | PS