At www.physorg.com/print230986047.html … a paper in Nature on the role of oscillation in the corona of the Sun, known as Alfven waves, points out that when first observed in 2007 their amplitude did not appear great enough to drive the solar wind. New satellite observations reveal Alfven waves a 100 times stronger – enough to heat the Sun's outer atmosphere to millions of degrees and drive the solar wind. The waves are seen in high resolution images and can be viewed at www.sciencedaily.com/releases/2011/07/110727131404.htm
Trojan Asteroid.
NASA News July 27th says the recent WISE mission, which ended in February 2011, found the first Trojan asteroid sharing the orbit of the Earth (www.jpl.nasa.gov/news/news.cfm?release=2011-230&cid=release_2011-230 … it seems that Trojan asteroids share an orbit with a planet near stable points in front or behind and because they constantly lead or follow they can never collide (see also www.nasa.gov/wise)