This is where the "wind" of electrically charged particles coming off the Sun is slowed by pressure from the sparse gas found between the stars.

BBC: Voyager impression (Nasa)

"We are determined that the Syrian opposition is not going to be dangling in the wind wondering where the support is or if it is coming, " Kerry said from London.

CNN: STORY HIGHLIGHTS

Yet wind is far from a perfect source of electricity, since the wind blows when and where it will.

FORBES: Financial Innovation is Blowin' in the Wind

The evidence from countries like Germany and Denmark, where wind power has been tried on a larger scale, is not encouraging.

ECONOMIST: Wind farms

I'm writing this blog from Petermann Glacier in northwest Greenland, where a cold katabatic wind is blowing off the ice onto the deck of the Greenpeace ship Arctic Sunrise.

CNN: The story

Instead of using aircraft-borne chemicals as seeds, the researchers propose spraying seawater from unmanned, wind-powered, satellite-controlled vessels that would cruise the latitudes where hurricanes form since droplets of brine have a similar effect to dry ice and silver iodide.

ECONOMIST: Fiddling with clouds could help tame hurricanes