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"name": "Angelos Vourlidas", "employer": "NRL" } ] }, { "role": "Writer", "people": [ { "name": "Karen Fox", "employer": "ADNET Systems, Inc." } ] } ], "missions": [], "series": [], "tapes": [], "papers": [], "datasets": [], "nasa_science_categories": [ "Sun" ], "keywords": [ "App", "Narrated" ], "recommended_pages": [], "related": [ { "id": 11180, "url": "https://svs.gsfc.nasa.gov/11180/", "page_type": "Produced Video", "title": "SDO Provides First Sightings of How
a CME Forms", "description": "On July 18, 2012, a fairly small explosion of light burst off the lower right limb of the sun. Such flares often come with an associated eruption of solar material, known as a coronal mass ejection or CME — but this one did not. Something interesting did happen, however. Magnetic field lines in this area of the sun's atmosphere, the corona, began to twist and kink, generating the hottest solar material — a charged gas called plasma — to trace out the newly-formed slinky shape. The plasma glowed brightly in extreme ultraviolet images from the Atmospheric Imaging Assembly (AIA) aboard NASA's Solar Dynamics Observatory (SDO) and scientists were able to watch for the first time the very formation of something they had long theorized was at the heart of many eruptive events on the sun: a flux rope. Eight hours later, on July 19, the same region flared again. This time the flux rope's connection to the sun was severed, and the magnetic fields escaped into space, dragging billions of tons of solar material along for the ride — a classic CME. More than just gorgeous to see, such direct observation offers one case study on how this crucial kernel at the heart of a CME forms. Such flux ropes have been seen in images of CMEs as they fly away from the sun, but it's never been known — indeed, has been strongly debated — whether the flux rope formed before or in conjunction with a CME's launch. This case shows a clear-cut example of the flux rope forming ahead of time.Watch this video on YouTube. || ", "release_date": "2013-01-31T13:00:00-05:00", "update_date": "2023-05-03T13:52:26.400970-04:00", "main_image": { "id": 468887, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011100/a011180/Flux_Rope_Still_3.jpg", "filename": "Flux_Rope_Still_3.jpg", "media_type": "Image", "alt_text": "Solar scientists have long known that at the heart of the great explosions of solar material that shoot off the sun — known as coronal mass ejections or CMEs — lies a twisted kink of magnetic fields known as a flux rope. But no one has known when or where they form. Now, for the first time, NASA's Solar Dynamics Observatory as captured a flux rope in the very act of formation.For complete transcript, click here.", "width": 1280, "height": 720, "pixels": 921600 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }