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From What's Next In Science & Technology:
Helium may act as a "throttle" for the solar wind, setting its minimum speed, according to new results from an MIT-led team using NASA's Wind spacecraft.
The solar wind is a diffuse stream of electrically conducting gas (plasma) constantly blowing from the sun. "This result gives us another clue about how the solar wind is accelerated, which may help us better understand space weather," said Justin Kasper, a research scientist at MIT's Kavli Institute for Astrophysics and Space Research and lead author of a paper on this research that appeared in the Astrophysical Journal May 1.
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