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Question
The outermost layer of the Sun is called
Options:
A .  Corona
B .  Lithosphere
C .  Photosphere
D .  Chromosphere
Answer: Option A
Answer: (a)
The outermost layer of the sun is the corona. Only visible during eclipses, it is a low-density cloud of plasma with higher transparency than the inner layers. The white corona is a million times less bright than the inner layers of the sun but is many times larger.
A corona is a type of plasma “atmosphere” of the Sun or other celestial body, extending millions of kilometers into space, most easily seen during a total solar eclipse, but also observable in a coronagraph.
The word “corona” itself derived from Latin, meaning crown. The high temperature of the corona gives it unusual spectral features

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