Astronomers Unveil the Magnetic Field of the Solar Corona

摘要

The Sun's corona is the outermost part of the Sun's atmosphere, which expands into interplanetary space. The solar corona is so faint that it is visible only during a total solar eclipse when the bright solar disc is completely blocked by the Moon. The corona releases streams of energised, charged particles, primarily electrons and protons, flowing outward which is called the solar wind. The solar wind, mostly made of plasma, travels through the solar system at speeds as high as 900 km/s and a temperature of 1 million degrees Celsius.