Web1 day ago · The low corona, near the surface of the Sun, has a particle density around 10 15 m −3 to 10 16 m −3. [83] [e] The average temperature of the corona and solar wind is about 1,000,000–2,000,000 K; however, in the hottest regions it is 8,000,000–20,000,000 K. [84] Although no complete theory yet exists to account for the temperature of the corona, at …