The Sun's corona, a region of space that surrounds the star and is millions of degrees hotter than its surface, has long been a mystery to scientists. How can this happen? How can the corona remain so hot despite frequent eruptions that lose huge amounts of energy? Now, a new study from India's Aditya-L1 solar observation mission provides some vital clues to unlocking these mysteries. The findings, published in the prestigious Astrophysical Journal Letters, reveal that the corona's temperature variations defy the laws of physics and that there is a mechanism by which the corona maintains its inexplicably high temperature. This mechanism involves two factors: bubbling, boiling motions on the Sun's surface that generate waves carrying energy to the corona, and tangled magnetic field lines that snap and reconnect, replenishing the lost energy. The study, led by Prof. R Ramesh of the Indian Institute of Astrophysics (IIA), quantifies how much energy each of these systems supplies to the corona, explaining both why it's so many times hotter to begin with and how it retains that temperature after consistently losing energy. The findings are significant because they provide an important benchmark for future studies into the potential energy generation mechanisms in the Sun's atmosphere. They also raise deeper questions about the fundamental laws of physics that defy logic. As Prof. Ramesh says, 'We do recognise that energy generated by bubbly motions plays a major role in it, but we have evidence that it is not sufficient. Our study shows that the magnetic field lines snapping and reconnecting everywhere on the Sun are the primary source for supplying most of the energy.' This is a fascinating and important discovery that sheds light on the enduring mysteries of the Sun's corona. It also highlights the importance of continued scientific exploration and discovery in understanding the universe.
