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Latest Hannes Alfvén Stories

2009-03-25 11:51:37

U.K. scientists say they have solved one of the most puzzling features of the sun: why its outside atmosphere is hotter than its inner photosphere. Researchers from Belfast's Queen's University and Britain's University of Sheffield said the surface of the sun, known as the photosphere, reaches temperatures of 5,000 degrees Celsius, while its outer atmosphere, known as the corona, can reach temperatures of more than 1 million degrees Celsius. The scientists discovered evidence for the...

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2007-12-06 16:17:56

Imagine you are sitting around a campfire. Move closer to the fire, and you get hotter. Move away, and you get cooler. Pretty basic, right? Well, the closest star, our sun, doesn't seem to be getting this. As you move away from the solar surface, into the sun's outer atmosphere, the corona, it actually gets a lot hotter before it cools off. The solar surface is about 10,000 degrees Fahrenheit, while temperatures in the corona soar to millions of degrees. Although scientists have some ideas...


Latest Hannes Alfvén Reference Libraries

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2013-03-16 00:00:00

Hannes Olof Gösta Alfvén (May 30, 1908 - April 2, 1995) was a Swedish plasma physicist born in Norrköping, Sweden. Alfvén received his PhD from the University of Uppsala in 1934. His thesis was titled "Investigations of the Ultra-short Electromagnetic Waves." He was originally trained as an electrical power engineer and later moved on to research and teaching in the fields of plasma physics. Alfvén made many contributions to plasma physics, including theories describing the...

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Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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