- News Home
6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
- About Us
ScienceShot: The Sun's Twisted Tail
10 July 2013 5:45 pm
NASA's Interstellar Boundary Explorer (IBEX) spacecraft has stared back "downwind" to look at the sun's own tail. Much as the sun's solar wind blows out the tails of comets, the vanishingly thin stuff between the stars blows the charged particles and magnetic fields of the solar wind back into a tail. The effect is much the same as when the sun's "wind" of charged particles and magnetic fields blows a comet's gas and dust into a tail. Most stars have such tails, as here imaged by telescopes. IBEX rendered the sun's "heliotail" by recording uncharged atomic particles streaming toward it from the direction of the tail. Contrary to predictions, the sun's tail is slightly twisted by the interstellar magnetic field and reflects the varying intensity of solar wind emissions back on the sun. As best as IBEX researchers can tell, the heliotail disperses some 1000 times farther from the sun than is Earth.