10-3-2014, 05:41 AM
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#1072
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Join Date: Nov 2007
Location: I live in the last place where you Look.
Age: 31
Posts: 7,376
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Re: Terry's Astronomy Thread.
Thanks for the kind words Calwyn!
Daily Suspicious0bserver's Weather Post:
October 3, 2014
What's in the sky tonight?
October 3, 2014
-Departing sunspot complex AR2172-AR2173 erupted on Oct. 2nd around 1915 UT, producing an M7-class solar flare. NASA Solar Dynamics Observatory photographed a massive plume of debris flying away from the blast site.
A flash of UV radiation from the flare ionized the top of Earth's atmosphere, briefly disturbing the normal propagation of shortwave and VLF radio signals on the dayside of Earth. Otherwise there should be few Earth-effects from this eruption. Perched on the sun's western limb, the instigating sunspot group is not facing our planet and most of the explosion's debris should sail wide of Earth.
There is a slim chance that a CME emerging from the blast site could deliver a glancing blow to Earth's magnetic field in a few days. To evaluate this possibility, NOAA analysts are looking carefully at coronagraph data from SOHO and STEREO.
Astro Picture of the Day:
October 3, 2014
Source:
Stepping stones seem to lead to the Milky Way as it stretches across this little sky. Of course, the scene is really the northern hemisphere's autumnal equinox night. Water and sky are inverted by a top to bottom, around the horizon stereographic projection centered on the zenith above Lake Storsjön in Jämtland, Sweden. In the north the Milky Way arcs from east to west overhead as fall begins, but the season is also a good time for viewing aurora. Geomagnetic storms increase in frequency near the equinox and produce remarkable displays of northern lights at high latitudes, like the eerie greenish glow reflected in this watery cosmos.e green channel.
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