The Sun is a huge, glowing ball at the center of our solar system. The sun provides light, heat, and other energy to Earth. The sun is made up entirely of gas. Most of it is a type of gas that is sensitive to magnetism. This sensitivity makes this type of gas so special that scientists sometimes give it a special name: plasma. Nine planets and their moons, tens of thousands of asteroids, and trillions of comets revolve around the sun. The sun and all these objects are in the solar system. Earth travels around the sun at an average distance of about 92,960,000 miles (149,600,000 kilometers) from it.
The sun is one of over 100 billion stars in the Milky Way Galaxy. It is about 25,000 light-years from the center of the galaxy, and it revolves around the galactic center once about every 250 million years. One light-year, the distance that light travels in a vacuum in a year, equals about 5.88 trillion miles (9.46 trillion kilometers). Image credit: NASA/Transition Region & Coronal Explorer
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Cabe añadir que las auroras polaris son el reflejo mismo del efecto de ese magnetismo que irradian los gases solares sobre ese planeta que llamamos Tierra. A manera de protección contra el potente Rey Sol, el magenetismo de la Tierra se encarga de redirigir los torrentes de plasma provenientes del Sol hacia los polos. Así, se provoca ese espectáculo de luz solamente visible en los extremos Norte y Sur del planeta.
Por su potencia la presencia de ese plasma no permitiría la existencia de absolutamente nada sobre la faz de la Tierra, por lo que una aurora polaris podría considerarse garantía misma de la vida en el planeta.
Como te supo, Yara?
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