The Whirlpool (M51) with a strong bias toward presenting the structures present in the H-alpha data. This was inspired by my recent interpretation of NGC 4449 in which I used a similar process.
Green: hlsp_heritage_hst_acs-wfc_m51_f658n_v1_drz_sci + hlsp_heritage_hst_acs-wfc_m51_f555w_v1_drz_sci
North is NOT up. It is 90° clockwise from up.
Hubble data is public domain, but I put a lot of work into combining it into beautiful color images. The minimal credit line should read: NASA / ESA / J. Schmidt
This work is licensed under a Creative Commons Attribution 3.0 Unported License.