August 17, 2012

The Sun Is Round... Almost too Round

Marissa Fessenden, SciAm

AP Photo

The 11-year solar cycle swoops between peaks of intense magnetic activity—apparent as sunspots, coronal loops and flares—and relative quiescence, when the sun's face is free of blemishes. New research shows that despite this tumult, the sun remains remarkably constant in its globular shape—findings that have left researchers scratching their heads.

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TAGGED: Nasa, Solar Cycle, Sun


October 12, 2013
A 90-Day Trip to Mars Is Very Possible
Mike Wall,
Sending astronauts to Mars aboard a superfast spacecraft powered by nuclear fusion may seem like a sci-fi dream, but it's entirely attainable, scientists say.The physics behind a fusion-driven rocket have been... more ››
October 19, 2013
How to (Realistically) End the World
Ethan Siegel, Starts with a Bang!
Well, it’s Friday again, and that means it’s time to dip into the question/suggestion box, and see what you’ve come up with for me. This week’s Ask Ethan comes from our reader Michael Acosta, who wants to... more ››
October 16, 2013
Another Clue in the Solar Corona Mystery
Columbia University
Drs. Michael Hahn and Daniel Wolf Savin, research scientists at Columbia University's Astrophysics Laboratory in New York, NY, found evidence that magnetic waves in a polar coronal hole contain enough energy to heat the corona... more ››