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Eugene Parker
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Eugene Newman Parker was an American solar and plasma physicist. In the 1950s he proposed the existence of the solar wind and that the magnetic field in the outer Solar System would be in the shape of a Parker spiral, predictions that were later confirmed by spacecraft measurements. In 1987, Parker proposed the existence of nanoflares, a leading candidate to explain the coronal heating problem.
Parker in 2018 at the launch of the solar probe that bears his name
Parker in 2018 at the launch of the solar probe that bears his name
Stellar corona
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A corona is the outermost layer of a star's atmosphere. It is a hot but relatively dim region of plasma populated by intermittent coronal structures known as solar prominences or filaments.
The solar corona with its coronal streamers streaching out, as well as solar prominences (in red) along the limb of the earthshine illuminated Moon du
Image from TRACE at 171Å wavelength (extreme ultraviolet) showing coronal loops
Image from TRACE at 171Å wavelength (extreme ultraviolet) showing coronal loops
Image taken by the Solar Dynamics Observatory on October 16, 2010. A very long filament cavity is visible across the Sun's southern hemisphere.
Image taken by the Solar Dynamics Observatory on October 16, 2010. A very long filament cavity is visible across the Sun's southern hemisphere.
On August 31, 2012, a long filament of solar material that had been hovering in the Sun's outer atmosphere, the corona, erupted at 4:36 p.m. EDT
On August 31, 2012, a long filament of solar material that had been hovering in the Sun's outer atmosphere, the corona, erupted at 4:36 p.m. EDT