On 16 June 1972, the Naval Research Laboratory's coronagraph aboard OSO-7 tracked a huge coronal cloud moving outward from the Sun. Concurrent observations of the inner corona made by the High Altitude Observatory at Mauna Loa showed bifurcation of the underlying coronal structure. Together, these observations can be interpreted as evidence for the stretching of the closed fields into a ‘magnetic bottle’, extending to at least eight radii from the center of the Sun.
KeywordsResearch Laboratory High Altitude Naval Research Naval Research Laboratory Coronal Structure
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