Solar Wind - Notable Events

Notable Events

  • From May 10 to May 12, 1999, NASA's Advanced Composition Explorer (ACE) and WIND spacecraft observed a 98% decrease of solar wind density. This allowed energetic electrons from the Sun to flow to Earth in narrow beams known as "strahl", which caused a highly unusual "polar rain" event, in which a visible aurora appeared over the North Pole. In addition, Earth's magnetosphere increased to between 5 and 6 times its normal size.
  • See also the solar variation entry.
  • December 13, 2010, Voyager 1 determined that the velocity of the solar wind, at its location 10.8 billion miles from Earth has now slowed to zero. "We have gotten to the point where the wind from the Sun, which until now has always had an outward motion, is no longer moving outward; it is only moving sideways so that it can end up going down the tail of the heliosphere, which is a comet-shaped-like object," said Dr. Edward Stone, the Voyager project scientist.

Read more about this topic:  Solar Wind

Famous quotes containing the words notable and/or events:

    “In one notable instance, where the United States Army and a hundred years of persuasion failed, a highway has succeeded. The Seminole Indians surrendered to the Tamiami Trail. From the Everglades the remnants of this race emerged, soon after the trail was built, to set up their palm-thatched villages along the road and to hoist tribal flags as a lure to passing motorists.”
    —For the State of Florida, U.S. public relief program (1935-1943)

    “Just as a mirror may be used to reflect images, so ancient events may be used to understand the present.”
    —Chinese proverb.