I am sure I posted about the Harrison Planetarium show at Greenwich. The show was about twin satellites launched by NASA to take stereo film of the sun and the current increase in activity.Quote:
Originally Posted by leelai
The increased sun activity results, amongst other things, in more frequent and more intense Aurora displays in both hemispheres of Earth. There were excellent explanations of the Aurora and how Earth's polar magnetic fields are essential in protecting us from bombardments from space.
I'm not sure whether the planetarium show is available worldwide, or for schools. It should be. I'm sure NASA would distribute such shows.
I cannot find details of the show online. Perhaps it isn't being run now. However, here is a link to a Wiki article about the planetarium. http://en.wikipedia.org/wiki/Peter_Harrison_Planetarium
You can check the show schedules via a further link at the end of the article.
I found this on the NASA website. http://www.youtube.com/v/7Mz2laHjVoQ...=youtube_gdata
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.
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