What Causes Some Galaxies to Release Superluminal Jets?

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appplejack
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I've got this assignment but have missed a few classes due to a health reasons.
To be honest I have no idea for how to approach this problem. I don't ask you guys to answer it for me but I'd like to know what I can do to approach this problem. For example, what should I read and think about in order to be able to answer this question.
I have to write a 2-page report on this question. I'd really appreciate any help.

Homework Statement



Some collections of stars called galaxies release jets of gas. Some of these jets have been measured to travel faster than the speed of light in a vacuum. Write a two page report on these measurements and explain why relativity theory is not violated.

The Attempt at a Solution

 
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hi appplejack! :smile:

start with http://en.wikipedia.org/wiki/Superluminal_motion" :wink:

(in case you're wondering, i got it by googling ' jet "faster than light" ')
 
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