Weegy: The CORONA is the hottest layer of the Sun's atmosphere.
User: The _____ of the Sun has a temperature of about 15 million Celsius.
Weegy: The core of the Sun has a temperature of about 15 million Celsius.
User: Hydrogen fusion occurs in the _____ of the Sun.
Weegy: Hydrogen fusion occurs in the core of the Sun.
User: The core of a star must reach a temperature of _____ degrees Celsius for hydrogen fusion to begin. 10,000 100,000 1,000,000 10,000,000 100,000,000
Weegy: The core of a star must reach a temperature of 10,000,000 degrees Celsius for hydrogen fusion to begin.
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