![]() Some coronagraphs are used with ground-based telescopes others are carried on satellites. A special instrument called a coronagraph allows astronomers to view the corona at other times. During a total solar eclipse the wispy corona briefly comes into view as the Moon blocks out the solar surface. The surface of the Sun is far too bright to allow a glimpse of the much fainter corona. But the temperature at the sun’s surface the source of that energy is a relatively balmy 5,500 degrees. We normally cannot see the solar atmosphere, including the corona. The temperature in the corona is a blistering million or so degrees Celsius. The density of plasma falls rapidly through the transition region moving upward from the chromosphere to the corona. However, the temperature increases very steeply from 6000. Temperatures rise sharply in the transition region, from thousands of degrees in the chromosphere to more than a million degrees in the corona. The photosphere - the visible surface of the Sun - has a temperature of about 6000 degrees C. For example, the core of the Sun has a temperature of about 15 million degrees Celsius, and the. ![]() A relatively narrow area called the transition region separates the corona from the chromosphere. Different regions of the Sun have different temperatures. The corona is above the Sun's lower atmosphere, which is called the chromosphere. The pressure and density in the corona is much, much lower than in Earth's atmosphere. The temperature in the corona is more than a million degrees, surprisingly much hotter than the temperature at the Sun's surface which is around 5,500° C (9,940° F or 5,780 kelvins). The material in the corona is an extremely hot but very tenuous plasma. It has a temperature of approximately two million kelvins and an. It extends many thousands of kilometers (miles) above the visible " surface" of the Sun, gradually transforming into the solar wind that flows outward through our solar system. Corona, outermost region of the Suns atmosphere, consisting of plasma (hot ionized gas). The corona is the outer atmosphere of the Sun. NCAR's High Altitude Observatory and NASA SDO< 'The corona is very tenuous plasma it is not a hugely dense area,' Fox said. Two views of the Sun's corona: during an eclipse (top) and in ultraviolet light (bottom).
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