SN 1006 Supernova Remnant Expansion Comparison
Comparison of visible hydrogen emission in the NW filament of SN 1006 in data taken at the CTIO 0.9m telescope (H-alpha, continuum-subtracted; Winkler, et al.) in 1998 (shown in green), and the Hubble ACS data (Raymond et. al) in 2006 (shown in red). The stellar background is from WFPC2 broadband B, V, and I data from 2008 (Hubble Heritage Team).