corona
Longstanding mystery of Sun’s hot outer atmosphere solved
One of the most enduring mysteries in solar physics is why the Sun’s outer atmosphere, or corona, is millions of degrees hotter than its surface.
Now scientists believe they have discovered a major source of hot gas that replenishes the corona…
Smithsonian instrument ‘fills the gap,’ views sun’s innermost corona
During a total eclipse of the Sun, skywatchers are awed by the shimmering corona — a faint glow that surrounds the Sun like gossamer flower petals. This outer layer of the Sun’s atmosphere is, paradoxically, hotter than the Sun’s surface, but so …