Ison Comet

  • #26
davenn
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The motions in the comets tail are primarily caused by fluctuations in the solar wind and by coronal mass ejections (which is what you are seeing in the above video clip - a CME)
 
  • #27
Dotini
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The motions in the comets tail are primarily caused by fluctuations in the solar wind and by coronal mass ejections (which is what you are seeing in the above video clip - a CME)
Ah ha, a CME! This blog of Karl Battams has a 2007 video of 2P/Encke's tail being completely ripped off by a CME. http://www.isoncampaign.org/karl/comets-in-solar-wind

His colleagues say the stronger magnetic field of the CME caused the tail to reconnect from the IMF.
 
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  • #28
Dotini
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It looks unlikely that C/2013 A1 (Siding Spring) is an issue for the rovers and satellites at mars, unless it comes extremely close or hits Mars. See this article for details.

ISON will come close to Mars (0.07 AU) as well, but without a reasonable impact probability.
The fly-by of Siding Spring to Mars has now come and gone. According to early findings, the rover and satellite operators were very glad they placed their vehicles on the side of the planet facing away from the comet.
http://www.nasa.gov/press/2014/november/mars-spacecraft-reveal-comet-flyby-effects-on-martian-atmosphere/
 

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