Tableau saturne : infographie de la séquence principale

Astronomy infographic titled "Main Sequence in the Star Lifecycle", GALAXY anatomy adapted into a scientifically accurate educational layout for the general public: a clean central Milky Way spiral galaxy diagram highlighting where main-sequence stars are commonly found across the galactic disk, spiral arms, thin disk, thick disk, bulge, halo, and stellar neighborhoods; include a clear note "Diagram not to scale" in English because galaxy structure, stellar sizes, and distances are simplified. Render the central diagram with scientifically reasonable galaxy proportions: barred spiral Milky Way seen in semi-top-down anatomy view, warm golden stellar disk, darker midnight background, subtle halo glow, dense yellow-white bulge, thin spiral arms with scattered blue star-forming regions and red older stellar populations. Add 7 labeled callouts in English with canonical scientific names and one accurate fact each: "Main-sequence star" — "Hydrogen fusion in the core powers the star"; "O-type main-sequence star" — "Surface temperature: 30,000+ K"; "A-type main-sequence star" — "Typical mass: about 1.4 to 2.1 solar masses"; "G-type main-sequence star" — "The Sun is a G-type main-sequence star"; "M-type main-sequence star" — "Lifespan can exceed 100 billion years"; "Orion Arm" — "The Sun is located in the Orion Arm"; "Galactic Center" — "Distance from the Sun: about 26,700 light-years". Mark each object with name, a scale-aware label such as relative stellar size class or galactic region context, and one fact. Add a small English scale-reference strip: "Sun diameter = 1,392,700 km", "1 light-year = 9.46 trillion km", "Milky Way diameter = about 100,000 light-years". Include a simple lifecycle side ribbon in English showing context: "Stellar nebula -> Protostar -> Main sequence -> Red giant / Supergiant -> White dwarf / Neutron star / Black hole", with the "Main sequence" stage highlighted. Visual style: minimal flat scientific, midnight gold palette, elegant restrained contrast, editorial astronomy illustration, dark-mode-friendly cosmic palette, vector-clean infographic layout. 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 UFO / pseudoscience imagery, no watermarks Scientifically accurate facts, no UFO / pseudoscience imagery, no astrology framing. Sizes and distances are typically not to true scale — label as such.