This dramatic view of the Horsehead nebula region is because it is imaged solely in Hydrogen Alpha filter.(Black & White)
Furthermore, all the stars were digitaly removed to emphasize the FIRE like Hydrogen structures.
These flames resemble Dante's vision of the Hell....
14" F2.2 RASA telescope.
2 HRS of Ha (10 minutes frames)
QHY600M camera
Imaged from Tivoli farm Namibia