Prompt
A vertical 2:3 headshot portrait of a single skull astronaut filling the central half of the frame with the helmet rim aligned to the middle vertical axis and the forehead reaching the upper third of the crop. The skull is bone-toned with subtle age cracks, exposed dental structure, and dark orbital voids, and it looks directly at the viewer with the eye-sockets centered and penetrating. The helmet is shadowed inside with matte metal ring and small scuffed pitting visible in the lower-left quadrant of the visor frame. Background is a deep, inky black that fills the upper two-thirds and edges, devoid of stars or highlights to suggest infinite emptiness. Lighting is low-key and side-biased, creating a soft rim on the helmet and faint specular on the scuffed metal while leaving the skull interior in brooding shadow. Texture emphasis falls on the porous bone surface, brushed metal helmet, and subtle visor smudges, with shallow depth isolating the subject from the void.
