>From: SpaceWeather.com <[EMAIL PROTECTED]> >Subject: Night-Shining Clouds Sighted over Europe>Date: Thu, 07 Jun 2007 >11:59:30 -0500 > >Space Weather News for June 7, 2007 >http://spaceweather.com > >NIGHT-SHINING CLOUDS: Last night a vivid display of electric-blue >noctilucent clouds (NLCs) appeared over parts of northern Europe, signaling >the start of the 2007 NLC season. Noctilucent or "night-shining" clouds >were first reported in the 19th century after the eruption of super-volcano >Krakatoa. In those days, NLCs were confined mainly to high latitudes, but >they have intensified and spread with sightings in recent years as far >south as Utah and Colorado. The origin of these clouds is a mystery; they >may be a side-effect of global warming. A NASA spacecraft named AIM is in >orbit now to investigate. > >The peak observing season for NLCs is late spring and early summer. For the >next two months, northern sky watchers should be alert for silvery tendrils >spreading across the western sky after sunset. High-latitudes (Canada, >northern Europe, Alaska) are favored, but NLCs are capable of descending >unknown distances south, so it pays to be alert no matter where you live. >Visit spaceweather.com for pictures and observing tips. > >BONUS BANG: Sunspot 960 remains big and active this week. Today's edition >of http://spaceweather.com features a movie of the sunspot erupting. It's >a must-see. > >If a friend sent you this alert and you would like to subscribe, click >here: http://spaceweather.com/services/ >
One of the best photos from the spaceweather site. http://spaceweather.com/nlcs/images2006/july/Urwin2.jpg Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
