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Michelle
Moistened Bint
Joined: 28 Oct 2004
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Location: At my desk
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 Posted: Mon Apr 24, 2006 6:12 pm Post subject: Black holes 'energy-efficient' |
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BLACK holes turn out to be "green".
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Black holes 'energy-efficient'
From: Reuters
From correspondents in Washington
April 25, 2006
BLACK holes turn out to be "green".
These monstrous matter-sucking drains in space are the most fuel-efficient engines in the universe, researchers said today.
Just how efficient? If a car could use this kind of engine, it could theoretically go about 356 million km on 1 litre of gas, said Steve Allen of Stanford University in California.
Unfortunately, no earthly car could do this, as black holes are fuelled by matter lured by the holes' vast gravity. Their pull is so strong that nothing, not even light, can escape.
Most of the energy released by this matter as it gets close to the black hole's point of no return - known as the event horizon - shows up in the form of high-energy jets, which spew forth from magnetised disks of gas.
These jets speed away from the black hole at speeds up to 95 per cent of the speed of light, which is 300,000km per second, and create huge bubbles in the hot cosmic gas of the galaxies.
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These bubbles can measure hundreds or even thousands of light-years across. A light-year is about 10 trillion km, the distance light travels in a year.
To come up with their fuel-efficiency estimate, Mr Allen and his colleagues used NASA's orbiting Chandra X-Ray Observatory to peer into the inner regions of nine giant elliptical galaxies. This view gave the scientists an idea of how much matter - the black holes' fuel - was available.
Other Chandra observations were used to figure out how much power would be required for the jets to produce the big bubbles, the researchers said in a telephone news briefing. The energy in the jets is some trillion trillion trillion watts, Mr Allen said.
The fuel reservoirs for these high-efficiency black hole engines are so big they could keep things going for hundreds of billions of years - many times the current estimated age of the universe, which is 13.7 billion years.
This fuel-efficient phenomenon may be common to giant galaxies such as the ones the researchers observed, but probably not to the Milky Way, which contains earth. These giant galaxies are about 10 times as massive as ours.
These supermassive black holes are "green" in another way, said Kim Weaver of NASA's Goddard Space Flight Centre: they appear to limit star formation and galactic sprawl.
The heat coming from the black hole jets is believed to heat up the gas around the galactic centre; without this source of heat, the gas would cool down and form new stars, Ms Weaver said.
"This is one way to keep the stars from forming and letting the galaxies grow bigger," she said.
More information is available online at http://chandra.harvard.edu.
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Sir Hamster of Elderberry
KWSN ArchBishop
Joined: 20 May 2002
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Location: Beer City, Cheese Quadrant
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| Posted: Tue Apr 25, 2006 10:43 pm Post subject: |
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Wait ... if Black is Green, what color is Green? 
ni! i!u |
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Michelle
Moistened Bint
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jbyram2
Prince
Joined: 23 Jun 2004
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Location: NMoP EpISdn
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| Posted: Fri Apr 28, 2006 12:18 pm Post subject: |
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Say the name of the color the letters ARE, not what they SAY
The first one, say "RED", etc.
Green
White
Yellow
Red
Blue
Orange
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alpha_fruit
Prince
Joined: 16 May 2005
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Location: Western North Carolina, USA
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| Posted: Fri Apr 28, 2006 12:44 pm Post subject: |
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The second is blue.
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Fart in your gen direxion
I am the goatse.cx guy
Joined: 24 May 2002
Posts: 2022
Location: Regrettably for you, I'm Upwind in Upstate N.Y.
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| Posted: Fri Apr 28, 2006 2:07 pm Post subject: |
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| alpha_fruit wrote: | | The second is blue. |
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alpha_fruit
Prince
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Location: Western North Carolina, USA
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| Posted: Fri Apr 28, 2006 2:26 pm Post subject: |
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Stop being a smart azz. 
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Sir Hamster of Elderberry
KWSN ArchBishop
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Location: Beer City, Cheese Quadrant
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| Posted: Fri Apr 28, 2006 4:08 pm Post subject: |
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| alpha_fruit wrote: | | Stop being a smart azz. |
Oh don't worry, we are in NO danger of that! 
Gosh but I missed you folks this past week!
ni! i!u |
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alpha_fruit
Prince
Joined: 16 May 2005
Posts: 5805
Location: Western North Carolina, USA
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| Posted: Fri Apr 28, 2006 5:12 pm Post subject: |
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We missed you 2, sorry you are having problems, but it taught us something. Do feed the penguins with no clotyhes on. They got to Sir Jolly Green Giant and plum ruirnt him. He'll never have another girl friend. He is so ruirnt.
Have fun on your trip.  
ni! iu
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A Shrubbery
Prince
Joined: 24 Jun 2004
Posts: 1861
Location: Pacific NW
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| Posted: Fri Apr 28, 2006 9:37 pm Post subject: |
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But this one is Yellow. Is that meant to throw us off?
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Michelle
Moistened Bint
Joined: 28 Oct 2004
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alpha_fruit
Prince
Joined: 16 May 2005
Posts: 5805
Location: Western North Carolina, USA
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| Posted: Sun Apr 30, 2006 5:17 am Post subject: |
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| A Shrubbery wrote: |
But this one is Yellow. Is that meant to throw us off? |
No, that one looks orange.
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A Shrubbery
Prince
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Location: Pacific NW
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| Posted: Sun Apr 30, 2006 11:55 am Post subject: |
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The board may call it orange, but it's not. Not near enough red in it.
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davide405
Knight
Joined: 22 Mar 2006
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Location: Central USA
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| Posted: Sun Apr 30, 2006 3:42 pm Post subject: |
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Does this mean that green is the new black ?  |
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A Shrubbery
Prince
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Posts: 1861
Location: Pacific NW
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| Posted: Sun Apr 30, 2006 9:07 pm Post subject: |
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Only before Labor day, after that it's Mauve.
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KWSN - A Shrubbery
Shrubbing since 2000 for the KaNI!ghts. |
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IcaBoD
Knight
Joined: 28 Apr 2006
Posts: 40
Location: Ashtabula, Ohio
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| Posted: Sun Apr 30, 2006 10:00 pm Post subject: |
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But as everyone knows mauve is not a naturally occuring color, therefore if a Post-Labor Day Mauve hole appears, it would be proof of a sinister entity creating synthetic black (mauve) holes.
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Fart in your gen direxion
I am the goatse.cx guy
Joined: 24 May 2002
Posts: 2022
Location: Regrettably for you, I'm Upwind in Upstate N.Y.
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| Posted: Sun Apr 30, 2006 10:43 pm Post subject: |
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| IcaBoD wrote: | | But as everyone knows mauve is not a naturally occuring color, therefore if a Post-Labor Day Mauve hole appears, it would be proof of a sinister entity creating synthetic black (mauve) holes. |
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IcaBoD
Knight
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| Posted: Sun Apr 30, 2006 11:15 pm Post subject: |
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Fart in your gen direxion
I am the goatse.cx guy
Joined: 24 May 2002
Posts: 2022
Location: Regrettably for you, I'm Upwind in Upstate N.Y.
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| Posted: Mon May 01, 2006 9:04 am Post subject: |
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Be careful what you say about them .
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Flatulenty yours,
Sir Fart
The Prince of Noxious Fumigations
The Earl of Eruption
The Baron of Breaking Wind
The Marquis of the Malodorous
The Monarch of Methane
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Michelle
Moistened Bint
Joined: 28 Oct 2004
Posts: 10233
Location: At my desk
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