[IRCA] Fw: Aurora Mystery Mission

["Art Blair" <artngwen@xxxxxxxxxx>]

----- Original Message ----- 
From: "SpaceWeather.com" <swlist@xxxxxxxxxxxxxxxx>
To: "SpaceWeather.com" <swlist@xxxxxxxxxxxxxxxx>
Sent: Friday, February 16, 2007 4:51 PM
Subject: Aurora Mystery Mission


> Space Weather News for Feb. 16, 2007
> http://spaceweather.com
>
> AURORA MYSTERY: Scientists have been watching and studying auroras for 
> centuries.  But if you thought everything is known about Northern Lights, 
> you'd be wrong. One key mystery is the "auroral substorm."  Sometimes, 
> with no warning, gently shimmering pale auroras erupt in a riot of 
> wildly-shifting colors. Why?  The answer could reveal important new 
> information about Earth's magnetosphere.
>
> On Saturday, Feb. 17, NASA plans to launch a fleet of five satellites into 
> Earth orbit.  The name of the mission is THEMIS and its goal is to crack 
> the mystery of the auroral substorm.  Visit Spaceweather.com over the 
> weekend for launch photos and mission updates.
>
> MIRA VARIABLE:  Meanwhile, 400 light years from Earth, a red giant named 
> Mira has swelled larger than the orbit of Mars. The pulsating star is now 
> at maximum brightness and can be seen with the naked eye after sunset. 
> Brightness: 2nd magnitude, similar to the stars of the Big Dipper. Take a 
> look, you may be seeing the future. Our own Sun could become a 
> Mira-variable when it evolves to red gianthood five billion years from 
> now.
>
> Visit http://spaceweather.com for sky maps and more information.
>
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