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Story summary
- Indian scientists using the Aditya-L1 mission reported clues on why the Sun’s corona stays hot.
- Prof R Ramesh of Indian Institute of Astrophysics led the study published in Astrophysical Journal Letters.
- The core is ~15 million °C, the photosphere ~5,500 °C, and the corona ~2 million °C, sometimes 40 million °C.
- Ramesh noted the corona must generate heat to replace energy lost in flares and CMEs that cause auroras and can disrupt grids and satellites.
