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Wednesday, September 24, 2008
Sun's Wind And Output On Extended Dimmer Switch: Scientists
From CNews Science:
WASHINGTON - The sun has dialled back its furnace to the lowest levels seen in the space age, new measurements from a space probe show.
But don't worry - it's too small a difference to change life on Earth, scientists say.
In fact, it means satellites can stay in orbit a little longer.
The solar wind - a stream of charged particles ejected from the sun's upper atmosphere at 1.6 million kilometres per hour - is significantly weaker, cooler and less dense than it has been in 50 years, according to new data from the NASA-European solar probe Ulysses.
And for the first time in about a century, the sun went for two months this summer without sunspots, said NASA solar physicist David Hathaway.
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