NASA http://kgou.org en U.S. 'Space Fence' Will Cease To Operate, Site Says http://kgou.org/post/us-space-fence-will-cease-operate-site-says A U.S. radar system that tracks thousands of objects orbiting Earth — from satellites to harmful debris — has been slated for shutdown, according to the Space News site. The ground-based network known as the "Space Fence" may cease to operate in October.<p>"This is your notice to begin preparing the sites for closure," a memo from Air Force Space Command told the contractor that operates the arrays last week. Thu, 08 Aug 2013 18:55:30 +0000 Bill Chappell 11243 at http://kgou.org U.S. 'Space Fence' Will Cease To Operate, Site Says NASA: Sun Getting Ready For A 'Field Flip' http://kgou.org/post/nasa-sun-getting-ready-field-flip Our nearest star is about to pull a once-in-11-years move by swapping its north and south magnetic poles.<p>The sun's polarity switch is a natural part of "solar max" — the period of peak activity during what averages out to be roughly an 11-year cycle. Thu, 08 Aug 2013 16:44:00 +0000 Scott Neuman 11237 at http://kgou.org NASA: Sun Getting Ready For A 'Field Flip' Astronauts Go On Spacewalk To Fix Ammonia Leak http://kgou.org/post/live-webcast-astronauts-spacewalk Two astronauts went on a last-minute spacewalk Saturday to replace a pump suspected of being the source of a serious ammonia leak.<p>It was unclear what caused the ammonia leak, NASA spokesman Rob Navias said, "but the installation of this spare pump package — at least at the moment — seems to have done the trick."<p>NASA officials called the spacewalk a success, but said it would take time to see if the leak was indeed stopped. Sat, 11 May 2013 13:45:12 +0000 Mark Memmott 5693 at http://kgou.org Astronauts Go On Spacewalk To Fix Ammonia Leak