HST F487N (4865 Å) image of Her 36 and its surroundings overlaid with [C II] channel map contours (in white) at (a) 2 km s⁻¹, (b) 5 km s⁻¹, and (c) 7 km s⁻¹ to show the progression of the foreground material at lower velocities. Her 36 is the central position (Δ α = 0, Δ δ = 0) at RA(J2000) denoted with an asterisk at RA(J2000) = 18^h03^m40.3^s and Dec(J2000) = − 24°22′43′′, with the hourglass nebula representing the two bright hotspots about ~15′′ to the east. Contour levels are from 10% to 100% in steps of 10% of the peak emission observed at the channel with 10 km s⁻¹ velocity.