Create Infographic: How a Star Forms 4-Step Poster

Educational infographic poster titled "How a Star Forms" in portrait layout, designed as a simple 4-step sequence for astronomy enthusiasts; all text labels must be sharp, clean, readable sans-serif English typography. Hand-drawn sketch / whiteboard aesthetic with warm earth tones palette: terracotta, sand, ochre, muted brown, dusty orange, cream background, subtle charcoal linework; curious, technical, approachable mood; magazine-grade editorial illustration, vector-clean lines, no photographic textures.

Show 4 clearly numbered stages arranged vertically with connecting arrows and small dotted flow lines between each panel; each stage has a bold heading, a one-line caption, and a precise visual diagram element:

1. heading: "Nebula"; caption: "A cold cloud of gas and dust begins to gather under gravity." Visual: hand-drawn cloud-like nebula with swirling dust specks, faint gravity arrows pointing inward, small labels for gas and dust, simple starfield background, large number 1 in a circle.

2. heading: "Collapse"; caption: "The cloud contracts and forms a dense, hotter core." Visual: cutaway-style shrinking gas cloud with concentric inward arrows, denser dark center, sketch lines showing compression, dotted boundary of the original cloud size for comparison, large number 2 in a circle.

3. heading: "Protostar"; caption: "A young protostar forms as material falls inward and heats up." Visual: glowing central sphere inside a rotating disk, curved arrows showing accretion flow, short motion lines around the disk, small surrounding dust particles spiraling inward, large number 3 in a circle.

4. heading: "Main Sequence Star"; caption: "Fusion starts in the core and the star shines steadily." Visual: bright star cross-section with a highlighted core, radiating light rays, tiny outward energy arrows, a simple label ring indicating stable stage, large number 4 in a circle.

Include a clean legend box with the exact labels: "Inward Gravity", "Heating Core", "Accretion Disk", "Stable Fusion" paired with small icons. Use sequential arrows from 1 to 2 to 3 to 4, with subtle dotted guide lines to reinforce the progression. Keep spacing uncluttered, diagrams simple and educational, with clear hierarchy of title, numbered stages, captions, and legend.

All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no watermarks Render labels and headings in clean English typography (sans-serif). No real-brand logos, no copyrighted characters, no people that could be identified, no graphic medical content. If the topic touches a regulated domain (medicine, finance, law), keep the explanation conceptual and add no specific dosages, prices or legal advice.