Space Weather News for June 20, 2008
http://spaceweather.com
SUMMER SOLSTICE: Northern summer and southern winter begin today, June 20th, at precisely 23:59 UT (7:59 pm EDT) when the sun ascends to its highest latitude on the celestial sphere. In the Northern Hemisphere, we have the longest day and shortest night of the year, and the reverse in the Southern Hemisphere. The seasons are changing--Happy Solstice!
NOCTILUCENT CLOUDS: Summer is the season for noctilucent clouds and this morning, right on cue, a wave of bright NLCs rolled over the British Isles. Observers in Scotland and Northern Ireland report luminous tendrils of electric blue bright enough to attract the attention of casual passersby. These glow-in-the-dark clouds are a 100+ year old mystery under investigation now by NASA's AIM spacecraft. Originally confined to arctic latitudes, NLCs have spread in recent years with sightings in the United States as far south as Utah and Colorado. Check today's edition of http://spaceweather.com for observing tips and the latest photos.
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