00:0050-Year Solar Mystery Solved
00:02The incredible secret behind the sun's flares
00:06Since the 1970s, an enigma has baffled solar scientists
00:11The strange width of spectral lines during solar flares
00:15For decades, it was thought that this expansion was caused by turbulent motions in the solar plasma
00:21However, this explanation never quite fit
00:25Leaving a large gap in our understanding of how solar flares truly work
00:29But now, after 50 years, a new study from the University of St. Andrews has revealed a surprising solution
00:37Solar flares are violent events that release enormous amounts of energy
00:41Heating the sun's outer atmosphere to more than 10 million degrees Celsius
00:46These explosions not only bombard Earth with radiation
00:50But they also give us clues about the physics of stars
00:53One of the biggest mysteries has been the unusual width of the spectral lines
00:58Those light signatures that the plasma emits during flares
01:03The turbulence theory never fully explained the phenomenon
01:06And the problem persisted for half a century
01:09The key to solving this enigma came from a change in perspective
01:13Historically, scientists assumed that the ions and electrons within the plasma had the same temperature
01:20However, the research team led by Dr. Alexander Russell discovered something fundamental
01:25The magnetic reconnection process
01:28Responsible for heating the plasma
01:31Heats ions 6.5 times more than electrons
01:35Although this phenomenon had already been observed near Earth and in the solar wind
01:40It had never been linked to solar flares
01:42By redoing the calculations with this new understanding
01:47The team realized that the incredibly high temperatures of the ions persist for minutes in the most crucial parts of the flares
01:53What was previously attributed to turbulence is now largely explained by the extreme heat of these ions
02:01This new view fits perfectly with observations and offers an unexpected and convincing solution to a 50-year-old mystery
02:09This discovery is a reminder that sometimes
02:12The key to solving great mysteries is not in seeking new answers
02:16But in re-evaluating old assumptions
02:18The sun, our closest star, continues to surprise us
02:23Revealing its secrets, ion by ion
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