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  2. May 11, 2023 · Where does the sun's heat come from? The sun is made of gas and plasma. Most of the gas — 92% — is hydrogen. If the sun were smaller, it would just be a huge ball of hydrogen akin to Jupiter.

  3. May 6, 2024 · Learn how the Sun's gravity, pressure, and nuclear fusion produce heat and light that affect the solar system. Watch a video, download a poster, and read a transcript of this story.

    • 3 min
  4. The core is the hottest part of the Sun. Nuclear reactions here – where hydrogen is fused to form helium – power the Sun’s heat and light. Temperatures top 27 million °F (15 million °C) and it’s about 86,000 miles (138,000 kilometers) thick. The density of the Sun’s core is about 150 grams per cubic centimeter (g/cm³).

  5. Dec 13, 2023 · Learn about the temperature of the Sun's different layers, from the core to the corona, and how it varies. Find out how scientists measure the Sun's temperature and how it compares with other stars and Earth's extremes.

  6. Jul 17, 2021 · The Sun is nearly a perfect sphere of hot plasma. The average surface temperatures are at around 5.778 K, but they vary since it is composed out of three layers. Our Sun is an enormous energy and light-producing sphere of glowing gases. Though it is the hottest object in the solar system, other stars are far hotter, even tens of times so.

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  8. Jan 15, 2014 · The sun, a massive nuclear-powered source of energy at the center of the solar system, generates the heat and light that sustain life on Earth. But how hot is the sun? But how hot is the sun? The ...

  9. en.wikipedia.org › wiki › SunSun - Wikipedia

    Why is the Sun's corona so much hotter than the Sun's surface? (more unsolved problems in astronomy) The temperature of the photosphere is approximately 6,000 K, whereas the temperature of the corona reaches 1,000,000–2,000,000 K. The high temperature of the corona shows that it is heated by something other than direct heat conduction from the photosphere. It is thought that the energy ...

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