- News Home
27 November 2013 12:59 pm ,
Vol. 342 ,
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
Until recently, the Defense Advanced Research Projects Agency (DARPA) kept its plans for its $70 million portion of the...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
- About Us
ScienceShot: Magnetic Tornadoes Rage on the Sun
27 June 2012 1:20 pm
The discovery of "super-tornadoes" rising above the surface of the sun may help solve the mystery of how our home star heats it wispy outer atmosphere to a million degrees. There is plenty of energy below the 5780° visible surface to do the job, but solar physicists have long argued about how that energy heats the corona, seen as an encircling crown of light that emerges during a total solar eclipse. Now a group reports online today in Nature that, using both spaceborne and ground-based telescopes, it has detected 1500-kilometer-wide swirls of solar atmosphere rising from the surface into the corona. Each lasts 10 to 15 minutes, and there are about 11,000 of them on the sun at a time. Computer simulations (picture) show how similar-looking the twisting magnetic field lines of a solar tornado are to real tornadoes. Now solar physicists must figure out how much energy super-tornadoes deliver compared with other proposed energy sources.
See more ScienceShots.