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 [krṓmə-sfîŕ]
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Chromosphere - Wikipedia, the free encyclopedia
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Observation of the Chromosphere ... The gases of the Sun extend far beyond the photosphere, which may be considered the lowest level of the solar atmosphere. The region immediately above the photosphere is called the chromosphere.
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The chromosphere is a narrow layer above the photosphere that raises in temperature with height. Normally, it can't be seen by the naked eye because the light from the photosphere of the Sun overpowers it.
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The Chromosphere ... The chromosphere is an irregular layer above the photosphere where the temperature rises from 6000° C to about 20,000° C. At these higher temperatures hydrogen emits light that gives off a reddish color (H-alpha emission).
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Above the photosphere is a layer of gas, approximately 2000 km thick, known as the chromosphere or sphere of color. In the chromosphere energy continues to be transported by radiation. Hydrogen atoms absorb energy from the photosphere and most of the energy is then emitted as red light.
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This is an image of the Sun's chromosphere, from chromos, the Greek word for color. This layer of the Sun can be detected with a telescope that looks for the red light it gives off, called Hydrogen-alpha light.
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The chromosphere lies just outside the photosphere, and is almost completely transparant. On the picture to the left, taken during a solar eclipse, the chromosphere can be seen as a red glow just around the Sun. (Click on the image for a larger version.)
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Encyclopedia article about chromosphere. Information about chromosphere in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing dictionary. ... Composition and Characteristics of the Chromosphere...
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The Sun's chromosphere starts from a temperature of about 6,000 K at the top of the photosphere. While the lower 1,500 km or so is more or less continuous, the upper chromosphere features jagged spicules. At the same time, the density drops by a factor of about a million from bottom to top.
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