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Where does the sun´s energy come from? - Contenido educativo
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Space Place. In a snap.
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Where does the sun's energy come from?
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Every 1.5 millionths of a second,
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the sun releases more energy than all humans consume in an entire year.
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Without the sun, there would be no light, no warmth, and no life.
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Its heat influences the environments of all the planets,
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dwarf planets, moons, asteroids, and comets in our solar system.
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How does a big ball of hydrogen create all that heat?
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The short answer is that it is big.
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If it were smaller, it would be just a sphere of hydrogen, like Jupiter.
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But the sun is much bigger than Jupiter.
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It would take almost 1,000 Jupiters to fill it up.
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That's a lot of hydrogen.
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That means it's held together by a whole lot of gravity,
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and that means there is a whole lot of pressure inside of it.
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In fact, the pressure is so intense and the density so great
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that the hydrogen atoms collide with enough force
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that they literally meld into a new element, helium.
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This process, called nuclear fusion, releases energy
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while creating a chain reaction that allows it to occur over and over and over again.
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That energy builds up.
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It gets as hot as 27 million degrees Fahrenheit in the sun's core.
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The energy travels outward through a large area called the convective zone.
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Then it travels onward to the photosphere,
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where it emits heat, charged particles, and light.
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That heat powers the chemical reactions that make life possible on Earth, allows gases
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and liquids to exist on many planets and moons, and causes icy comets to form fiery halos.
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Those particles create a solar wind that pushes against the fabric of interstellar space billions
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of miles away.
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And that light travels far out into the cosmos, just one star among billions and billions.
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Not too bad for a big ball of gas, no?
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Find out more about the Sun at NASA Space Place.
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- Autor/es:
- Irene Godoy
- Subido por:
- Irene G.
- Licencia:
- Reconocimiento - Compartir igual
- Visualizaciones:
- 12
- Fecha:
- 6 de agosto de 2023 - 13:08
- Visibilidad:
- Público
- Centro:
- CP INF-PRI MARIA BLANCHARD
- Duración:
- 02′ 30″
- Relación de aspecto:
- 1.78:1
- Resolución:
- 1920x1080 píxeles
- Tamaño:
- 121.72 MBytes
