The Sun's corona — the faint halo visible only during a total solar eclipse — routinely reaches temperatures of 1 to 2 million degrees Celsius, while the visible surface just below it sits at around 5,500 degrees, a paradox that has puzzled astrophysicists since 1939

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How it spread - 2 original reports

1. Thu, 6 August 2026

   1 report
   • spacedaily.com19:30first to report
     The Sun's corona — the faint halo visible only during a total solar eclipse — routinely reaches temperatures of 1 to 2 million degrees Celsius, while the visible surface just below it sits at around 5,500 degrees, a paradox that has puzzled astrophysicists since 1939

     The Sun's outer atmosphere reaches millions of degrees while the surface below is far cooler. Waves, reconnection and new spacecraft measurements explain parts of the paradox, but not yet all of it.

2. Fri, 14 August 2026

   1 report
   • BBC News World02:13
     Indian solar mission's new findings throw light on enduring Sun mysteries

     Why is the Sun's corona millions of degrees hotter than its surface? And how does it maintain its inexplicably high temperature?