上一片的灾害都在地球上折腾。今晚🌌星空向导带你出门：抬头那颗太阳并不特殊。它普通，却是地球一切能量的总源头。Last leaf, every disaster stayed on Earth. Tonight the 🌌 star guide takes you outside: the Sun overhead is nothing special. It is ordinary — yet the source of all Earth's energy.
第 1 步：一颗普通的恒星Step 1: An ordinary star
先给太阳验明正身——它到底算老几。First, check the Sun's ID — what exactly is it?
太阳是一颗 G 型黄矮星（就是颜色偏黄、个头中等的恒星）。银河系有几千亿颗恒星，它只是其中之一。它一个人占了太阳系 99.8% 的质量。地球的光、热、风和四季，全是它发的工资。The Sun is a G-type yellow dwarf (a medium, yellowish star). The Milky Way holds hundreds of billions of stars — it is just one of them. Yet it owns 99.8% of the solar system's mass. Earth's light, heat, wind and seasons are all its salary to us.
普通归普通，肚子里可不普通——切开看看有几层。Ordinary outside, not so ordinary inside — slice it open and count the layers.
第 2 步：三层结构和脸上的斑Step 2: Three layers and spots on its face
从里到外记住三层：核心约 1500 万℃，4 个氢挤成 1 个氦（这叫核聚变光球约 5500℃，是我们看到的亮面。黑子是光球上的凉斑（约 4000℃）。看着暗，只因周围更亮。Remember three layers inside out: the core (about 15 million °C) squeezes 4 hydrogen into 1 helium — nuclear fusion. The photosphere (about 5,500 °C) is the bright face we see. Sunspots are its cool patches (about 4,000 °C) — dark only because the surroundings blaze brighter.
脸上有斑不算啥，太阳发起脾气来才壮观。Spots are nothing — wait till the Sun loses its temper.
第 3 步：发脾气 → 极光Step 3: Temper tantrums make auroras
耀斑是突然的大爆发。日冕物质抛射是往外砸出一团带电粒子。它们化作太阳风吹到地球，被磁场抓住，就点亮了极光。太强的风暴还会惹出磁暴，干扰电网和卫星。Flares are sudden giant outbursts. A coronal mass ejection hurls a cloud of charged particles outward. They become the solar wind; caught by Earth's magnetic field, they light the aurora. Strong storms also cause magnetic storms that bother power grids and satellites.
🎮 太阳剖面游（30 秒）🎮 Tour the Sun's layers (30 seconds)
道理讲完了。星空向导把太阳切好了：读题点对那一层，一共 4 站。Theory done — the star guide has sliced the Sun. Read each clue, tap the right layer: 4 stops.
一句话记住它：太阳是普通的 G 型恒星，却是地球能量的总源头——核心聚变发光，太阳风能吹出极光。Remember it in one line: the Sun is an ordinary G-type star, yet Earth's total energy source — fusion in the core shines, and the solar wind paints auroras.
太阳是 G 型黄矮星，普通一员，占太阳系 99.8% 质量The Sun is a G-type yellow dwarf — ordinary, holding 99.8% of the system's mass核心核聚变供能；光球是亮面，黑子是上面的凉斑Core fusion powers it; the photosphere is the bright face, sunspots its cool patches耀斑和日冕物质抛射化作太阳风，撞上磁场就是极光和磁暴Flares and ejections become solar wind — auroras and magnetic storms on arrival
内容参考 OpenStax 等公开教材，多来源核对 · AI 生成、人工审核 · 发现错误欢迎指正，帮这片叶子长得更好。Based on OpenStax and other open textbooks, cross-checked across sources · AI-generated, human-reviewed · Spotted a mistake? Tell us — help this leaf grow.
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