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The AstronomersNASA SDO - Aurora; What Causes Them?
NASA SDO - Aurora; What Causes Them?
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Aurora are colorful lights in the night time sky primarily appearing in Earth's polar regions. But what causes them? The culprit behind aurora is our own Sun and the solar plasma that is ejected during a magnetic event like a flare or a coronal mass ejection. This plasma travels outward along with the solar wind and when it encounters Earth's magnetic field, it travels down the field lines that connect at the poles. Atoms in the plasma interacts with atoms in Earth's upper atmosphere.
Added on Apr 2, 2012 by deek
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Time: 04:49 | Views: 1094 | Comments: 0
  NASA  SDO  Solar  Dynamics  Observatory  hmi  aia  eve  sun  Aurora  plasma  earth  magnetic  field  atoms  interact  atmosphere  ejection  CME  storm  flare  sky  astronomy  space 
  Solar astronomy  
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