Atomic Age Pulp Illustrates Four Philosophers in Retro Futuristic Style

2x2 grid, 16:9, do this for 4 famous philosophers: +=====================  ATOMIC AGE PULP ILLUSTRATION  ·  flat vector · 5 hues  =================+
|   ✦ 4‑pointed star   ╭─ ringed planet (Googie cosmos) [A₃] ─╮   ✦ sparkle                    |
|                      │                                       │                                |
|      ╭─ spacewoman (stylized proportions, sleek pose) [A₅] ─╮│                                |
|      │  [bubble helmet] [silver suit + coral geometric accents]│                                |
|      │  [retro ray gun] (Atomic Age tech) [A₂]               ││                                |
|      ╰───────────────────────────────────────────────────────╯│                                |
|   ~ abstract boomerang space clouds ~  [A₃]                  ╰──────────────────────────────  |
|   palette: teal, coral, mustard, cream, navy (flat fills, no gradients) [A₁/A₄]               |
+===========================  the future, as imagined from 1958  ===============================+
‖∇I‖ ≈ 0 [A₁] · tech ∈ {bubble, fin, dial} [A₂] · |hues| ≤ 5 [A₄] · proportions stylized [A₅]
INVARIANT / Forbidden CHECKLIST   (✗ = the failure modes)
 [✓ A₁] flat vector illustration, bold shapes, no gradients  ✗ photoreal / 3D render / heavy gradients
 [✓ A₂] retro-futuristic tech (bubble helmets, fins, dials)  ✗ modern tech (screens, microchips)
 [✓ A₃] Googie/atomic cosmos (4-point stars, rings, orbits)  ✗ realistic space / photoreal stars
 [✓ A₄] strict mid-century palette (≤5 hues, flat fills)     ✗ neon / pastel / full RGB / muddy
 [✓ A₅] stylized proportions (long limbs, sleek silhouettes) ✗ anatomical realism / chibi
 [✓ η ] crisp vector edges, bold graphic impact