What are the jets seen leaving a black hole?

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Offline Robcat

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What are the jets seen leaving a black hole?
« on: 17/03/2015 20:53:28 »
All images I see are two jets firing out of a black hole light years away.  My question is what are the jets made of, if it's plasma , does that infer that the plasma is not held in effect by the gravitation of the black hole. I thought nothing like light can get out of a black hole, or am I missing something?
« Last Edit: 19/03/2015 21:21:46 by chris »

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Offline chiralSPO

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Re: Jets leaving a black hole
« Reply #1 on: 17/03/2015 23:37:44 »
Nothing can escape a black hole once it has passed the event horizon, but outside of that boundary a black hole is just acts as a heavy body with a large gravitational pull. If the sun were magically collapsed into a black hole, but remained exactly the same mass, none of the planets would change orbit--the gravitational attraction would be unchanged.

You can read about the jets here:

http://en.wikipedia.org/wiki/Astrophysical_jet

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Offline yor_on

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Re: What are the jets seen leaving a black hole?
« Reply #2 on: 21/03/2015 18:42:20 »
No, you're not missing anything there. Like Chiral wrote, and you will find a link in that link to something called a Accretion disc Black holes gets their definition through the existence of a 'event horizon', which is where you observing will find no light to return from. I'm not sure how to define where that takes place though, there's a whole terminology existing for where it happens, called 'apparent event horizons' if you want to become further confused :) (observer dependent event horizons). But you can reliably presume them to exist.
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Offline Robcat

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Re: What are the jets seen leaving a black hole?
« Reply #3 on: 31/03/2015 18:38:19 »
Thank you both of you, curiousity