Friday, December 23, 2011

Astronaut Photographs Comet Lovejoy ... From Space

You mean one for electrically charged stuff, and one for electrically neutral stuff, no? Sure, yea, that ends up mostly being ionized gas vs dust, but the reason there are two is because one is affected by the solar magnetic field in the guise of the solar wind, and one isn't.

Oh, okay, I used Google. We're both wrong. There are three tails, as shown in the figure here http://www.astronomycafe.net/qadir/q2805.html [astronomycafe.net] --- one for ionized gas, one for neutral gas (hydrogen, apparently), and one for dust.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/33QrBsF6zr8/astronaut-photographs-comet-lovejoy--from-space

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