Latest Alfvén wave Stories

Mysterious Math Of The Solar Wind Deciphered By NASA
2013-02-22 14:27:36

NASA Many areas of scientific research -- Earth's weather, ocean currents, the outpouring of magnetic energy from the sun -- require mapping out the large scale features of a complex system and its intricate details simultaneously. Describing such systems accurately, relies on numerous kinds of input, beginning with observations of the system, incorporating mathematical equations to approximate those observations, running computer simulations to attempt to replicate observations, and...

Space Turbulence Measured In The Lab
2012-12-18 05:47:51

[ Watch the Video: Measuring Space Tubulence ] April Flowers for redOrbit.com - Your Universe Online We all know that turbulence exists on Earth, but does it really exist in outer space? And if it does, how would you prove it? A research team from University of Iowa (UI) and the University of California, Los Angeles reports that they have directly measured space wind for the first time in a laboratory. “Turbulence is not restricted to environments here on Earth, but also...

2011-07-28 08:05:00

A new study sheds light on why the Sun's outer atmosphere, or corona, is more than 20 times hotter than its surface. The research, led by the National Center for Atmospheric Research (NCAR), may bring scientists a step closer to understanding the solar cycle and the Sun's impacts on Earth. The study uses satellite observations to reveal that magnetic oscillations carrying energy from the Sun's surface into its corona are far more vigorous than previously thought. These waves are energetic...

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...

2008-01-22 13:58:07

Powerful magnetic waves have been confirmed for the first time as major players in the process that makes the sun's atmosphere strangely hundreds of times hotter than its already superhot surface. The magnetic waves — called Alfven waves — can carry enough energy from the sun's active surface to heat its atmosphere, or corona. "The surface and corona are chock full of these things, and they're very energetic," said Bart de Pontieu, a physicist at the Lockheed Martin...

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...

Word of the Day
  • Scandinavian punch made of claret and aquavit with spices and raisins and orange peel and sugar.
This word comes from the Swedish 'glogg,' which is an alteration of 'glodgat,' mulled (wine).