Dust, dust and then some more dust.
This is Chamaeleon 1, part of the Chamaeleon CO Complex in the deep south. As opposed to the Dark Doodad (which is not far away) this region is rife with easily visible newly forming stars.
Hot bright large young stars are lighting up the dust with their blue light, whilst ones that are still forming are sending out jets of material from their dusty cocoons.
A distant galaxy on the left hand side, NGC3620, looks reddish because the dust scatters away the blue light. Like a smoky sunset on Earth.
120 x 300 second images acquired with
and processed with @Siril_Official